the burglar was later captured when he was spotted with whey on his face. call geico and see how much you could save on homeowners insurance. ahead this hour -- new clues and the search for answers in the egyptair disaster. plus the man and faces behind the numbers and the agony of family members that they've left behind. and the politics of guns. donald trump tries to rally his supporters by saying hillary clinton wants to take gun rights away from americans. hillary clinton answers back. live from cnn world headquarters in atlanta. welcome to our viewers in the united states and around the world. i'm george howell. "cnn newsroom" starts right now.

new evidence is giving clues as to what happened aboard egyptair flight 804 just moments before it crashed into the mediterranean sea. cnn has learn smoke alerts went off shortly before the plane disappeared from radar. searchers have as found debris and human remains in the sea. but we still don't know what caused that plane to crash on thursday. there was 66 people on board. egyptian officials expect terrorism but no group has come forward to claim responsibility. let's get the latest from cnn international correspondent arwa damon live at cairo's international airport. arwa, what more are you hearing about this investigation at this point? >> reporter: well, george, the details that are coming to lighting are really serving mostly to add to the mystery surrounding what the cause of this possible crash may be. you do have these various different smoke alarms that were

set off, that aren't even necessarily definitively indicative of any sort of fire breaking out. but could also have been set out by the plane come ago part. basically, all of all of its warning systems would have possibly gone on the fritz as it was colliding towards the mediterranean sea. all this is really proving agent this point is that there was some sort of crash. this is basically what we have known all along but we don't really know at this stage any sort of new information agency to whether or not this was some sort of catastrophic technical malfunction. or an act of terrorism. all that's happening is a severe amount of speculation around the various different causes that could have led to this horrific event that led to the loss of life of 66 people. 56 of them passengers. and then seven crew members, plus three security officers. the egyptian authorities have managed to recover a bit more

debris. and by that, i mean small items such as luggage seats. and then, of course, sadly, more human remains. the families of those who perished in this incident are still struggling. still trying to come to term with what happened. understandably, so, of course. trying to come to grips not only with their emotions but tools their frustration to a certain degree, anger over the fact that there hasn't been any significant developments when it comes to why this plane went down. of course that kind of information can be and generally is hard to come by in circumstances like these ones. because the chunks of wreckage that are needed to try to extract concrete answers are in the mediterranean sea at this stage. and their specific location has not yet been pinpointed. although we do have a better idea of where that wreckage may be. so there's very scant concrete information at this stage,

george. >> oh, one can only imagine the grief that these families have right now. so few answers. and we're in the middle of a process now, as this airline starts to notify next of kin. can you talk to us about that process? >> reporter: well, it's a very difficult one. because not only do these various different, and it's hard to even talk about it, human remains need to be identified, they're going to have to be going through a fairly length process of proper identification of identity. and of course, hanning those over to the various different relatives and nationalities. about 30 were egyptian nationals, about another 15, french. and the rest were from all different countries. and add into all of that, a lot of the remains have yet to be recovered. so for the families who are

waiting there is very little closure. incidentally, our ian lee went to one of the mosques yesterday where there were friday prayers being held for the dead. and in some cases even friday prayers being held for the missing. and some family members didn't attend and they didn't attend because they didn't want to accept that their loved ones were dead. were gone. it's a very difficult process for anyone to have to go through this. but to go through the loss of a loved one and not have closure, that is even more unbearable on some level. >> given the fact that this is still a search and rescue. you can imagine families holding out hope not wanting to go to that prayer service. arwa damon live for us, thank you for your reporting. let's talk more now about these four major possibilities that investigators are considering in this crash. first, a smuggled bomb. the early theory among u.s. officials is terrorism. but they caution as that as based on circumstances, and not

concrete evidence. scenario two, an insider threat -- did terrorists recruit an airport employee to sabotage the plane on the ground? scenario three, was it a technical issue. or scenario four, pilots or some other action. experts say all of these are plausible and it can be key to providing research on the crash. we have captain desmond ross from the dealt ae investigation, live from istanbul. dr. ross, with your extensive expertise in the aviation industry i'd like to get your reaction to these sirchdifferen scenarios. the first that i mentioned, a smuggled bomb, plausible? >> yes, plausible. airport employees in those areas

can be radicalized and very well paid. and money goes a long way. >> the second scenario that the plane was somehow sabotaged on the ground. is this something that we should be talking amore when it comes to security at the airports? >> absolutely. i cringe when people bring up a thing like a pilot crashing an air draft. an engineer is perfectly able of crashing an aircraft by leaving a bolt undone or hitting a pipe that's not correctly placed. there's all sort of employees, engineers, cabin attendants, not just pilots. there's a lot of people out there that have a direct effect on the directional capabilities of any aircraft that applies. >> let's talk about this possibility of a technical problem. especially given the new information that we've learned. what are your thoughts? >> it's -- look, egyptair, i

think, is actually quite a respectable airline as far as their maintenance and so forth. i've not heard any criticism of their maintenance. this aircraft of 2003, that's not really that old. it's a very reliable aircraft. the airbus 8020, and it's a plausible scenario, still, engines, we've seen it recently, a brand new a380 blew up a couple years ago. it happens but it's rare. i would rate that as one of the lower possibilities. >> okay. and then the other scenario that we mentioned to our viewers, pilot error. >> when you're flying at high altitude, and 37,000 is quite high, but it's not that high. i mean, you can go a lot higher up at 45 and whatever, they're

critical factors in controlling an aircraft. very critical speed bands and angle of attack which some fully understand. but you're going into an area of very thin area and the aircraft has to be handled quite accurate. . that's why autopilots are used. normally, a pilot doesn't handle an aircraft at that altitude. if something goes wrong, it requires very special training. i don't know that these pilots were trained. we can get into hours of methods of pilot training these days compared to when i did it it and some of my colleagues did. >> and i want to get your thoughts. again, we don't really have any concrete information. we have just bits an points of data that we're all trying to assess. when you talk about the descent here from 37,000 feet down to 15,000, down to 10,000, does that sound to you like it could have been a controlled decent.

or does that sound to you like a plane out of control? >> my initial reaction was was not a controlled descent. it looked like it was out of control essentially. and hearing about the smoke alarms and fire warning, which, frankly, i'm a little cautious about. we're hearing about them all morning, and we've seen transcripts but has anyone actually really confirmed that these are accurate? >> so you're questioning the accuracy? >> well i'm just wondering about it. i haven't been told and i have no evidence in front of me to say this was a genuine did from the acars system transmitting from that aircraft. i hope it is. i'd hate for this to be a red herring. i don't think it was a controlled descent staat all.

the left hand and then the spirals right-hand is not something you'd do. it ended up in a crash. the only plausible explanation, with the pilots it headed down immediately so the depressurization in the cabin didn't cause problems for passengers you need to be able to breathe. and you can't do that at 37,000 feet. that would have been the only plausible reason he would have been headed down and that would have been exacerbated by smoke in the cabin. i'm feeling at the moment, these smoke alarms, it's all true, it's all isolated. it wasn't in the lavatory or something else, it was in the whole airplane. that sounded like it was a fire or something exploding, it was bad. >> captain can desmond ross, we appreciate your insight.

again, we don't have any concrete information but again different points of data that we're trying to assess here. and we appreciate your experience and knowledge in the field to help us do that. >> we won't have anything final until the investigation is proven on a track. and parts are recovered and examined. and hopefully, the flight data recorder is recover fairly quickly. >> captain ross, thank you for your time today. when it comes to the search area, weather conditions have cooperated so far. but that could change in the hours to come. our meteorologist derek van dam is following this at the international important service. >> and george, it will likely change within the next 12 to 24 hours. here's the latest satellite trajectory. cairo and the eastern mediterranean and the general search that's taking play. we have a cold front coming, cloud cover as you saw on the

satellite a moment ago. it's not really the rain that i'm concerned about, it's the strong winds that are going to wrap in behind this particular front. and that will have, obviously, an impact on the waves and sea conditions as the search and rescue operations move forward. now, take a look at this. this is wind gusts. you can see the legend at the top portion of your screen, we're talking wind gusts monday morning into tuesday. in excess of 50 to 70 kilometers per hour. roughly, 40 to 50 miles per hour. we have the potential to see open ocean swells anywhere between one to three meters. this causes concern for any of the vessels taking part in the search and rescue operations. not to mention the strong winds impacting helicopters and aircrafts across this region. now, it's not only the weather but the ocean currents that we have to consider as a factor for the displacement of the possible debris field that they're

searching for extensively at the moment. this is the mediterranean ocean currents. these circular patterns are called eddies, spinning ocean currents found all over the world. not only in the mediterranean, but in the indian ocean as well as the atlantic. just to prove what i'm talking about. this is the potential of an oil slick that was spotted by a satellite. that is about 40 kilometers away from the last known communication position with the plane. now, taking you below the surface of the water, this is a relatively flat seafloor. when you compare this to perhaps mh370 over the indian ocean a year ago, they had to scour mountains and crevices and it made it it a tad easier for the search forces to find the all important black box. george. >> good to know that, derek. the difference that we saw with mh hchlh 370.

thank you so much. french airport security is under scrutiny after the egypt aircraft. why some airport workers there lost security clearances over the past year, when we come back. plus, families share stories of some of those lost on board the plane. their nieces, nephews and brothers. we'll all go with them. stay with us. wanna drink more water? with sodastream you turn plain water into sparkling water in seconds. and because it's so delicious, you'll drink 43% more water every day.

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♪ welcome back. the crash of egyptair flight 804 has people speculating that trim may have been a cause. but airport charles de gaulle has come under scrutiny. since early this year, dozens of security have lost security clearances. security is indeed ramping up at that airport as france is taking any threat of terrorism quite seriously, especially since its capital was the target of terror attacks last year. for more on what's happening,

let's bring in cnn's jim bitter mann in the nation's capital. to screen people, what has been done and what is being done? >> reporter: well, george, they're going over the recordings of anybody that came in contact with the egyptair jet. in fact, they're been looking at cttv cameras, the baggage handlers, security folks and all of that sort of thing. that is a process that began almost immediately after it was confirmed that 804 had crashed. even before it's known what brought down egypt err 804 security questions have been raised about its last departure. charles de gaulle airport. in that time, could someone have placed a bomb aboard, perhaps sitting in baggage or a food service cart.

or could a terrorism managed to board with other passengers. questions have been raised in part because of last year's bloody terrorist attacks in france. in their aftermath, interior ministry officials revealed that 85 security badges needed to access secure areas of the airport were revoked last year because the badge holderers allegedly showed signs of radicalization. what's for, airport security carried out a new sweep of employees again looking for anybody who might pose a threat. but 86,000 people work at the airport and screening for signs of radicalism is a daunting task. none the the, in the wake of the egyptair crash without knowing the cause, officials ordered a thorough investigation of anyone who might have come in contact with the plane and a review of video. >> this is not only a necessity by measures this is nor a judgment nor assumption but it's a failure it's a way to protect

you as we always have done to make sure our citizens are safe. >> reporter: in fact, officials from the president on down are trying to reassure everyone in the traveling public that security is their highest concern. since the egyptair crash it's been announced that more have been added to security personnel. >> translator: the government strengthened all of its measures. everything is being done to reinforce everywhere. >> reporter: but the french foreign minister has also said there's no such thing as zero risk. the egyptair crash has put the spotlight on security here in a very awkward time. in the next two months, the country will host the tennis championship, the european soccer championships and the tour de france bicycle race. events that will attract millions of people many who will travel through the same airport. the impact on those events could

be devastating. so, george, while the idea of security caused -- security flaw brought the plane down, they're still going to continue out here at the airport with the inspections of the cct footage with the idea that it probably can't hurt but might help. >> jim bittermann reporting live in paris. thank you. flight data shows stops in tunisia and air trayia. jeffrey thomas of airline.com explained the situations. >> if it turns out that there was a bomb on board that aircraft, then they'll obviously be looking at the first flight of the day which is from cairo

to the return flight. now a bureau of. >> m >>-r diplomatic security said in the united states said that unpredictable levels of security. while the british government warns that tunisia is the most dangerous area for britons to travel to. and we may call that last year we had the terrible tragedy where 31 britons were massacred at the beachside resort. so, both theories have serious question marks in the security level at the country and also at their airports. >> and we're also starting to hear from some of the relatives of the 66 people who were on board that plane. they are working with very few answers this day, and as you can imagine coping with great loss. here's cnn's miguel marquez with this story. >> reporter: the crushing reality setting in. their loved ones, gone.

we were at a press conference, he said. they said nothing. some people just collapsed then left. at cairo's el al sadique mosque, a painful gathering of friends and family an uncle of the plane's co-pilot mohamed mamdouh assem. >> he does want to get married. he is in any relationship, he does introduce me to his -- >> reporter: ten crew member, 55 passengers, two of them infants. today, their loved ones in shock, inconsolable, mara hari,

a devoted and loving mother, always there to offer a helping hand with a pure smile. richard os morning a geologist working in egypt. the 40-year-old leaves behind two infant daughters. >> he was just a very admirable person. a lot of people admire him for his strength and walls. >> reporter: pascal, almost didn't make the flight. he was headed to egypt to visit his sick father, he was said to be always smiling. the family of the head flight attendant on 804 says she was just starting a new life. she was a newlywed who got married six or seven months ago, she says. i asked god for the flight to be hijacked instead of what we've been told. we have hope.

with debris from the plane now being found, hope overtaken by grief. and now comes the painstaking task of finding the plane, recovering the bodies, doing dna testing and reunitie ing the families with their loved ones. these families have a long hard road to go. 427 a.m. on the a.m. east coast. still ahead, gunfire near the white house on friday. we'll explain why the secret service says they shot a man. plus, donald trump accuses hillary clinton of being the most anti-gun candidate to ever run for office. what else he told a powerful gun lobbying group about her gun positions. broadcasting live at this hour in the united states and around the world, you are watching "cnn newsroom." the second lasts all day. we give you your day back.

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welcome back to our viewers here in the united states, and around the world, you are watching "cnn newsroom." it is good to have you with us, i'm george howell with the headlines we're following for you this hoyer. new details are emerging about the moments before egypt err flight 804 disappeared from radar. cnn has learned smoke alarms went off shortly before the plane disappeared from its flight path. searchers have as found debris and human remains in the mediterranean sea. the infamous drug lord joaquin "el chapo" guzeman may be heading to the united states soon. the mexican ministry approved his extradition on friday. lawyers for guzman said they will appeal and he will stand

trial on federal charges if he arrives. and baghdad under protest for fortified green zone. security forces fired rocket bullets and tear gas. about 50 people were injured there. demonstrators also stormed the green zone late last month and occupied the parliament to protest there. in washington, d.c., we're learning more about a shooting that took place near the white house friday. a u.s. secret service agent said a man approached the checkpoint and brandished a gun. he was ordered to stop and then shot by a secret service agent when he didn't ply. cnn's joe johns has the story for us. >> reporter: security lockdown here at the white house, the secret service says a man with a gun approached a security checkpoint right around the corner from the front door of the white house. he was told numerous times to put the gun down, and when he did not do that, he was shot in

the stomach, taken into custody and then taken to the hospital. the man's name was not immediately released. >> i was like five feet away from the first with the public. and i saw the guy enter the other fence with a white shirt. you know, goes to the first fence. then i turned. i was on my phone. then i hear the gunshot very strong, very -- you know, then i turned and the guy was on the floor. i yelled to my family, hey, the guy got shot. the guy got shot. then i hear the police guards come with their guns and handcuffing him. >> reporter: authorities say the suspect's weapon was taken into custody and his vehicle was seized. the president of the united states was not in the white house complex at the time of the shooting, but the vice president was secured. no one other than the man with the gun was injured. joe johns, cnn, the white house.

it is america's choice 2016, and donald trump is trying to appeal to conservative voters by touting his strong support for gun rights. the national rifle association, a powerful gun lobbying group, endorsed the presumptive republican nominee on friday. trump wasted no time attacking democratic rival hillary clinton at that point. our jim acosta reports on the strong words the two have for each other. >> reporter: picking up the endorsement of the nation's top gun lobby, donald trump paid tribute to the nra. and then within seconds fired off tough lines of attack on hillary clinton. >> you know, i call her crooked hillary. she wants to abolish the second amendment week not going to let that happen. >> reporter: trump who once said he supported a ban said he now

backs a large. and if you would have had guns on the other side. there -- it might not have happened. >> reporter: and the presumptive gop nominee slammed clinton as being unqualified to be president. tying the egyptair disaster. >> i've been looking at airplanes getting blown up in the air. lots of bad things happen. bernie sanders who i'm sure you all love, he did say one thing that was interesting. he said hillary clinton is unqualified to be the president of the united states. he said she suffers from bad judgment. and she does. >> reporter: even though investigators have not publicly concluded the egyptair jet was targeted by terrorists. trump went as far to warn what might happen if more planes were taken out. >> you're going to have a depression worldwide the likes that you've never seen because nobody is going to travel.

>> well, chris it does appear that it was an act of terrorism. >> reporter: also speculating on the apparent downing of the egyptair jet, clinton is hitting right back at trump. >> i know how hard this job is, and i know we need steadiness southwest strength and smarts in it. i have concluded he is not qualified to be president of the united states. >> reporter: the result, well, a new poll suggests that clinton is holding on to a slight lead over trump that are both deeply unpopular. in a cbs news poll says they have unfavorable views of trudge and clinton. though 70% said trump lacks the temperament to be president an area she is better. and trump bragging about how many guns his sons own. >> they have so many rifles and guns, sometimes i get concerned. >> here again, the supreme court is wrong on the second

amendment. and i am going to make that case every chance i get. >> gun-free zones, we're getting rid of gun-free zones. >> reporter: trump is also taking a victory lap after the big wins. even working together a few double stuff jabs. >> i'm not eating oreos anytime. you know that. but neither is chris. you're not eating oreos anymore. no more oreos, chris, don't feel bad, for either of us. >> that was our jim a costa reporting there. as a point of fact, hillary clinton has actually never said she wants to abolish the second amendment. she quickly took to twitter to denounce donald trump's claim. you're wrong, real donald trump, we can 81 hold second amendment rights while preventing senseless violence. bernie sand serious not backing

town, sanders said he is the democratic candidate to defeat donald trump. not harrisbu not hillary clinton. he's keeping in the fight to stay in the race until all americans get a chance to get their voices heard at the polls. >> and let me also say that we are going to fight for every last vote between now and june 14th. and that we are going to take our fight into the democratic convention. >> turning now to nigeria, activists there say this girl rescued by the nigerian army is not one of the chibok school girls kidnapped. nigerian officials say it doesn't matter if she was abducted in the same group. but that her freedom is another victory against the militant

group boko haram. the military had claimed that she was among the 276 girls taken from their school in 2013. is this "cnn newsroom." still ahead -- an intense international search for wreckage continues for egyptair flight 804. we'll tell you what's been recovered from the waters of the mediterranean sea and how investigators still try to figure out what happened to this plane. plus, people in india, they are struggling to stay cool as the heat soars to record-setting temperatures. stay with us.

♪ the crash of egyptair flight 804 new details are coming out, about the final moments of that plane, but at this point, there are still no firm answers about what caused it to crash. flight data obtained by cnn indicates smoke alerts went

knauf near the cockpit just before the aircraft went down into the mediterranean sea. but aviation experts caution that doesn't necessarily mean there was a fire on the plane. at sea there have been some seats from the aircraft, luggage and human remains recovered. but the flight data and cockpit voice recorders, they are still missing. the search for the plane and those recorders has swiftly become an international effort. greece, france, united states, and the uk are all helping to search that area where the plane likely went down. our international diplomatic editor nic robertson has details on how they're focusing the hunt. >> reporter: from the cockpit windows here the air crew of c-140 cargo aircraft have the best visibility over the mediterranean sea. their crew, also in the side windows here, get good visibility down into the sea as well. the greek air force have two of these aircraft out over the sea. they have a surveillance

aircraft as well. we know that the british military have a naval vessel in the area. and the military with several or rye or ionp-3 allows them to focus in the area, southeast whereof the aircraft disappeared off the radar. it's a little north of that first debris field was found on thursday. of course, this a concern. the debris spotted b the air has to be checked on the ground. that slows down the operation. that is part of what's going on here. the greek air force putting in a lot of effort here they're willing to use their air base like this one here offering it to the allies to join efforts to help the authorities discover precisely where this egyptair craft went down. >> of critical interest is the plane's flight recorder.

the black box as it's commonly called. but the units aren't actually black, they are orange, to make them easier to spot wreckage. the data recorders are located in the tail of the plane where they're less likely to be damaged from impact. things like altitude, air speed and heading. as well as audio from the cockpit and engines. the two recorders for voice and data can be combined into a single unit to help search teams find them. the flight recorder send out a homing signal for up to 30 days after a crash. that radio ping can be detected even when it's being sent from 4,000 meters. that's more than 13,000 feet under water. officials fear the egyptair crash may discover tourists from visiting cairo. egypt relies on 11% of its funds

from tourism. here's what he said had say. >> today, we are encouraging people to travel, in spite of incidents. incidents can take place. we have seen what's happened, specifying whatever in every country, but exposed to the worldwide terrorist, i say we should give people the chance are the liberty to move, to travel, to enjoy themselves. it's part of giving the hope, the prosperity, the positivity for the world. that it don't stop people from enjoying your life, their time. being able to travel everywhere. we work globally, we make things faster, easier, safe for them. that's the role of all the

governments all over the world. >> if the investigators confirm the crash of the flight is the result of terrorism, it would be the third attack on an egyptian aircraft in six months' time. as you can imagine this has been an incredibly difficult time for the relatives. some family members of the missing came together in cairo, egypt, to pray for the victims. cnn's ian lee has this report. >> reporter: a day of prayer and mourning in egypt. many still in shock, 24 hours after egyptair flight 804 crashed. for the world, 66 people presumed dead, at this mosque, they were brothers, sisters, mothers, fathers and friends. co-pilot mohammed assem was about to get married. >> an absolutely very fine

person. in his age and humanity and sense of humor. he was the only one that was really -- what happened is really very much unfortunate. >> reporter: amid the tears, anger at the suggestion from some that pilots could have intentionally crashed the plane. >> this is the case of these two pilots without even going through the process of investigations. >> reporter: some family members avoided the mosque, not ready to mourn, hoping against all odds, their loved ones are still alive. but hope fades quickly as searchers recover the wreckage including body parts. scenes like this are playing out all over egypt. it's not just the friends and family who are mourning the victims of the egyptair flight, it's the entire country. >> we are one team. we are friends, we are family.

>> reporter: as the country comes to grips on how they died, loved ones find it important to remember how they lived. ian lee, cnn, cairo. can you actually love wearing powerful sunscreen? yes! neutrogena® ultra sheer. no other sunscreen works better or feels better. clinically proven helioplex® provides unbeatable uva/uvb protection to help prevent early skin aging and skin cancer all with a clean light feel. for unbeatable protection. it's the one. the best for your skin. ultra sheer®. neutrogena®. see what's possible.

people in india are dealing with some extremely hot weather. several states there estimate the heat wave has killed almost 400 people. the country had its highest ever recorded temperature on thursday. in the town of rajastan. it hit 50 degrees celsius. that is 124 degrees fahrenheit. most is sweltering. the capital of new delhi reached 114 degrees fahrenheit earlier this week. we're talking about a region of the world that is used to extreme temperatures but this is oppressive heat. our meteorologist derek van dam talks about what is happens. sfwlt world record for hottest temperature ever record, death valley, california, a very sparsely populated part of the world. july back in 1913, actually, so the temperature of 56.7 degrees

celsius. that's roughly 130 degrees fahrenheit. now, you take you temperatures that have topped 50 degrees celsius easily in a very populated part of the world and you can imagine just what people are trying to deal with. they're doing whatever they can to cool off, beat the heat. this gentleman taking advantage of a local water fountain in the capital of new delhi. take a look at these temperatures. not only northwest and central india. we're talking about pakistan where temperatures have soared into upper 50ss. and you factor in the heat indices. it feels even worse. it takes into consideration the amount of moisture in the atmosphere. relative humidity. unfortunately, the temperatures are not going to improve much from him. daytime highs, 38, 46 in nagpur.

temperatures in the 40s on average. and this is the flooding that's taking place across sri lanka. we've had a psych that moved from sri lanka into the coast of india and making its way into the border of bag la desch and myanmar. the latest information from the joint typhoon warning center actually increasing the speeds of the winds near 100 kilometers per hour near the center of the storm. it's really not the winds that i'm too concerned about, it's actually the amount of rain that will fall from the system as it continues to move across the region. more flooding anticipated as we saw in sri lanka. rainfall totals in excess of 300 millimeters. that will certainly lead to the potential of flooding and more mudslides across the region. >> and we went this hour with a look in brazil and the olympic torch. it is on tour through the

country, ahead of the summer games s iwith rio de janeiro. one of the leaders spoke about the torch's significant to the temperature. >> translator: for us, fire represents life so in all our events, we burn a blame during the day and night. it signifies, union, love, respect for our elder s and it is through the spire that we pass on our knowledge. >> bit opening ceremony, the flame will have traveled a total of 20 kilometers. that's over 12,000 miles across that country. that wraps this hour of "cnn newsroom." i'm george howell at the cnn center in atlanta. i'll be back after the break with another hour of news from around the world. you are watching cnn, the world's news leader.

new clues come to light about the final moments before egyptair flight 804 plunged into the mediterranean sea. and the search continues when the plane's black boxes. also, scrutiny over security at paris' charles de gaulle airport. finding out if a screening lapse could have led to the plane's downing. >> plus, a big endorsement for donald trump. one of the world's most powerful lobbying groups backs the candidate. welcome to viewers in the united states and around the world, i'm george howell. "cnn newsroom" starts right now.

investigators are working with new clues about what might have happened in the loss of egyptair flight 804. flight data shows that automated smoke alerts went off near the jet's cockpit just minutes before it dropped off of radar. aviation experts say the alerts do not necessarily mean there was a fire. searcher, still scouring the water after finding debris and lug and remains. we'll learn much more what happened to the plane once the cruise find the data recorder and cockpit voice recorder. cnn has teams of producers and photojournalists covering the story from all angles. at cairo's international airport, cnn's arwa damon is live. and our jim bittermann joins us at charles de gaulle airport in paris. we begin with you, arwa. what more can you tell us about what investigators are doing. the search and the

investigation? >> reporter: well, right now, the investigation pretty much is the search, at least it will be until they do manage to recover the bulk of the wreckage, and of course, that crucial black box that you were mentioning there, george. what we do now have say better idea of where that plane may be in the waters of the mediterranean. search teams have managed to recover a few more small items, things like suitcases and seats from the plane. as well as more human remains. that, of course, very difficult to talk about, especially when it comes to the family and all that they have gone through. there also was that oil slick that was spotted yesterday by satellite imagery that is also serving to give a better idea of where the bulk of the wreckage is. but really, until that is found, there is very little concrete information as to exactly what it was that brought this plane down. a lot of the theories are still

leaning towards terrorism, as opposed to some sort of massive technical malfunction. but at this stage, it really is just working theories with these various different bits and pieces of information that are slowly coming together. but not quite significantly enough to paint an accurate, bigger picture. you were talking about these smoke alarms going off. a lot of analysts saying, as you were mentioned there, too, this is not necessarily an indication that there was a fire. it very well could be that as this plane was plummet to get sea, the entire systems went haywire and sent off off of these various different alarms. of course, the families still here waiting for information. this is the most frustrating for them because they don't have closure. and some of them are in fact still clinging to the small thread of hope that maybe somehow, their loved ones may have been able to survive.

so, it's been unspeakably difficult for them at this juncture. and everyone, right now, really waiting for the bulk of the records of black boxes to eventually be recovered. >> arwa, when you talk about these families and the many people who are still clinging to hope, this is still being called a search and rescue, that's important to point out. but we are in the middle of a process now, as this airline goes through and starts to notify next of kin. if you could talk to us about what's happening there. >> reporter: well, as they do recover these various human remains, they are going to have to go through a process of trying to identify them. we don't know specifically what has been recover at this stage and what sort of analysis in tellers of trying to concretely identify individuals is under way. that that information has all been provided to us by egyptian

authorities. on just, family members of the egyptians who perished are here. and our ian lee was at one of the mosques in cairo and relatives of the crew and relatives were gathered there. and there was some anger or frustration that perhaps the crew was responsible for this. also some relatives of the french individuals who were on board who died, who are in egypt as well. then you have a series of other nationalities, here, too. this is going to be a very, very long process, as you can imagine. and every day that goes on is that much more difficult for the families who are involved in this. >> cnn's senior international correspondent arwa damon live for us in cairo. arwa, thank you so much. we'll stay in touch as we continue to follow this story. now, let's bring in jim bittermann who is in paris at the charles de gaulle airport. let's talk security there, jim.

the effort to screen people who had access to these planes. what has been done? what is being done? >> reporter: well, the process here continues, george. in fact, they've gone through the videotapes that they have made of the various closed circuit tv cameras, saand they' looking at the backgrounds of anybody that had contact with the egyptair flight. and this as much as anything else to reassure the public that everything is being done. it's a process that started almost immediately after it was confired that egyptair 804 crashed. even before it's known what brought down egyptair 804 security questions have been raidsed about the last point of departure, paris' busy charles de gaulle airport. in that time could one have placed a bomb aboard, perhaps

hidden in baggage or a food service cart. questions that have been raised in part because of last year's bloody terrorist attacks in france. in the aftermath, entiry ministry officials revealed that 84 security badges were revoked last year because the badge holders allegedly showed signs of radicalization. what's more, airport security carried out a new sweep of employees again looking for anybody who might pose a threat. but 86,000 people work at the airport and screening for signs of radicalism is a daunting task. nonetheless, in the wake of the egyptair crash without knowing the cause, officials ordered a thorough investigation of anyone who might have come in contact with the plane and a review of video footage which may have revealed untoward activity. >> translator: this is not only a necessity, but a priority of measures this is not a judgment

nor assumption but it's a failure it's a way to protect you as we always have done to make sure our citizens are safe. >> reporter: in fact, officials from the president on down are trying to reassure everyone in the traveling public that security is their highest concern. since the egyptair crash it's been announced that 30 new intelligence officers have been added to the 5700 security personnel already working at the airport. >> translator: the government strengthened all of its measures. everything is being done to reinforce everywhere. >> reporter: but the french foreign minister has also said there's no such thing as zero risk. the egyptair crash has put the spotlight on security here in a very awkward time. in the next two months, the country will host the french open tennis championship, the european soccer championships and the tour de france bicycle race. events that will attract millions of people many who will travel through the same airport. if there's no cause established for the crash which dispels

authority, the impact on those events could be devastating. part of what's going on is real reassuring the families of the victim. they've been taken at their request to the french foreign ministry, where the french foreign ministry is briefing them, and in fact, giving them the latest on the investigation going on. george. >> cnn's international correspondent jim bittermann live in paris. on board the plane as we talked about the victims, there were nieces, nephews and a man nearing hi wedding date. just a few people lost in this tragedy. and now we're hearing from some of the families struggling with a great deal of loss and grief. cnn's miguel marquez has this story. >> reporter: the crushing reality setting in. their loved ones, gone. we were at a press conference, he said. they said nothing. some people just collapsed then left.

at cairo's al sadik mosque, a painful gathering of friends and family an uncle of the plane's co-pilot mohamed mamdouh assem. >> he was about to get married. he was already in a relationship, and he does introduce me to his -- >> reporter: ten crew members, 56 passengers, two of them, infants, all looking forward to reyungs and new adventures in a disorienting turn, today, their loved ones, in shock, inconsolable. mary hari. posted on facebook -- a devoted and loving mother, always there to offer a helping hand with a pure smile. richard osman, a geologist from

wales working in egypt. the 40-year-old leaves behind two infant daughters. >> he was just a very admirable person. i think a lot of people admired him for his strength and values. >> reporter: pascal he is, an independent photographer from paris almost didn't make the flight. he lost his passport a week before the trip. he was 40 years ode. and the director of a procter & gamble plant was headed to egypt to visit his sick father. he was said to always be smiling. the family of the head flight attendant on 804 says she was just starting a new life. she was a newlywed who got married six or seven months ago, she says. i asked god for the flight to be hijacked instead of what we've been told. we have hope. with debris from the plane now being found, hope overtaken by grief. and now comes the painstaking task of finding the plane, recovering the bodies, doing dna

testing and reuniting the families with their loved ones. these families have a long hard road to go. miguel marquez, cnn, new york. >> so, when it comes to the search area, the weather is important. conditions there have cooperated so far, but that could change. we know now in the coming hours. our muir meteorologist derek va is there. >> it's likely to change in the next 24 hours as the cold front sweeps through the region. across the western mediterranean, this area of high pressure is starting to erode away thanks to the approach of the cold front. it's not the precipitation that i'm concerned about, it's the winds that will funnel in behind the system and that has the potential to hinder the search and recovery operation going on.

think about how wind impacts ocean currents, ocean waves and swells. a potential of one to three meter swells on the ocean. and that's going to impact the search vessels. look at the wind gusts going forward by the next two to three days. you can see by monday morning, they can easily gust between 60, even 65 kilometers per hour. as high as 45 miles per hour for the domestic audience. something to consider as the search and rescue operation continues to go forward. now, we also monitor ocean currents when we factor in the displacement of a potential debris field that is vibrating across the eastern mediterranean. this is a look at the mediterranean currents. anytime you see that circular pattern that is known as an eddy. an ocean eddy. we have them in the mediterranean, we have them in the atlantic ocean, we have them in the indian ocean. it's not only native to this part of the world but look ma it does. the oil slicks that we've been

showing images of lately. you can see in the middle of your tv screen, that has moved about 40 kilometers away from that last known communication point with the downed aircraft. certainly window displacing this debris field. let's take you under the sur fashion of the ocean. what i want to see, is this a relatively flat seafloor when we compare this to the mh 370 airline that took place across the indian ocean, they had to scour the seabed which had mountains and crevices that made it difficult. the depth in this particular area search area known as the sea basin, about 8,000 to 11,000

feet deep. because this is considered a search and rescue operation, george, we have to factor in the weather conditions because this has ramifications for survival. for a healthy adult we have the potential to survive in waters of this magnitude for maximum of 40 hours. >> one can only hope for the family's sake. it is important to point out is this still a search and rescue. derek van dam, thank you. we will have much more on the egypt crash ahead. plus, the details about gunfire near the white house. why the secret service says they shot a man. plus donald trump goes after hillary clinton on the issue of gun rights. what he told a powerful gun lobbying group about her positions. as "cnn newsroom" continues. you may be muddling through allergies. try zyrtec® for powerful allergy relief. and zyrtec® is different than claritin®. because it starts working faster on the first day you take it.

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the best for your skin. ultra sheer®. neutrogena®. welcome back to "cnn newsroom," i'm george howell. we are learning more about a shooting that took place near the white house friday. the u.s. secret service says a man approached a checkpoint and then brandished a gun. he was ordered to stop and then shot by a secret service agent when he didn't comply. cnn's joe johns has this story for us. >> reporter: security lockdown here at the white house, the secret service says a man with a gun approached a security checkpoint right around the corner from the front door of

the white house. he was told numerous times to put the gun down, and when he did not do that he was shot in the stomach, taken into custody, then taken to the hospital. the man's name was not immediately released. >> i was like five feet away from the first fence where the public is. then i hear -- i saw the guy enter the other fence with the white shirt. and then close to the first fence then i turned because i was on my phone. then i hear the gunshot. very strong very -- you know, then they turn, the guy was on the floor. i yelled to my family, hey, the guy got shot. the guy got shot. then i hear the police guards come with their guns handcuffing him. that's what i heard. >> reporter: authorities say the suspect's weapon was taken into custody and his vehicle was seized. the president of the united states was not in the white house complex at the time of the

shooting, but vice president was secured. no one other than the man with the gun was injured. joe johns, cnn, the white house. america's choice and the race for the white house. the presumptive republican presidential nominee received a key endorsement on friday from the national rifle association. a powerful gun lobbying group. donald trump took the opportunity then to go on the attack against democratic rival hillary clinton on gun rights. the two are increasingly going after each other, as they focus in now on the general election. our jim acosta has this report. >> reporter: picking up the endorsement of the nation's top gun lobby, donald trump paid tribute to the nra. and then within seconds fired off tough lines of attack on hillary clinton. >> you know, i call her crooked hillary. she wants to abolish the second amendment so we're fought going to let that happen.

>> reporter: trump who once supported an assault weapons ban said he now backs a broad production of gun rights. >> if you would have had guns on the other side, it might not have happened. >> reporter: and the presumptive gop nominee slammed clinton as being unqualified to be president. tying the egyptair disaster. to her record on terrorism as secretary of state. >> i've been looking at airplanes getting blown up in the air. lots of bad things happening. bernie sanders who i'm sure you all love, he did say one thing that was interesting. he said hillary clinton is unqualified to be the president of the united states. he said she suffers from bad judgment. and she does. >> reporter: even though investigators have not publicly concluded the egyptair jet was targets by terrorists, trump went as far as to warn what would happen if more planes were taken out. >> you're going to have a depression worldwide the likes

that you've never seen because nobody is going to travel. there will be no anything. >> well, chris, it does appear that it was an act of terrorism. >> reporter: also speculating on the apparent downing of the egyptair jet, clinton is hitting right back at trump. >> i know how hard this job is, and i know we need steadiness southwest as well as strength and smarts in it. i have concluded he is not qualified to be president of the united states. >> reporter: the result, well, a new poll suggests that clinton is holding on to a slight lead over trump that are both deeply unpopular. more than half of those surveyed in a "the new york times" cbs news poll say that they have unfavorable views of trump and clinton. though 70% said trump lacks the temperament to be president an area she is better. and trump bragging about how many guns his sons own. >> they have so many rifles and guns, sometimes i get concerned. i hey that's a lot.

>> reporter: and pointing to clinton's comments on gun control. >> here again, the supreme court is wrong on the second amendment. and i am going to make that case every chance i get. >> gun-free zones, we're getting rid of gun-free zones. okay? i can tell you. ♪ >> reporter: trump is also taking a victory lap after the big wins in the primaries. urging republicans to rally behind him. even working in a few double stuff jabs at chris christie. >> i'm not eating oreos anytime. you know that. but neither is chris. you're not eating oreos anymore. no more oreos, chris, don't feel bad, for either of us. >> that our our jim acosta reporting there. when donald trump skipped a debate in scan to host a veteran fund-raiser, he said that it raised $6 million. now, there's a problem with that. that's not accurate. trump's campaign manager told cnn that less than $6 million

has been raised. he described a discrepancy saying more money had been pledged than actually donated. "the washington post" reported that it netted about $4.5 million. but trump's campaign disputes that number as well. hillary clinton's focus may be on the general election against donald trump but she is not the democratic nominee yet. rival bernie sanders is still in the race and he has not barked down. sanders said that the superdelegate system in place wins the nomination for the establishment candidate. >> over 400 of these superdelegates indicated their support for secretary clinton before anyone else was in the race. in other words, the establishment determined who the anointed candidate will be

before the first voters got into the process. i think that that is a very, very bad idea. and it's an idea that we intend to change at the convention. >> here's a look at how the delegate count stands now. hillary clinton leads sanders by 290 pledged delegates, with superdelegates included, that lead grows to 770. while some republicans try to rally around donald trump, democrats seem to be growing farther apart. how will they bridge the democratic divide? our jonathan mann, for "political mann" looks into it saturday 7:30 p.m. in london. that's 10:30 in abu dhabi here on cnn. >> the u.s. navy took possession of a feweristic state of the art

destroyer. the zoomwalt. it is expected that all three ships will cost $22.5 billion. but they do provide a lost bang for their bucks. the builder, general dynamics, said the ship is suitable for an electromagnetic railgun. it's guns can also send projectiles over hundreds of kilometers or around 63 miles. this is "cnn newsroom" -- still ahead, egyptair flight 804 bass in four different countries in four different airports in 24 hours before it vanished. we'll have a look at how investigators are trying to narrow down what caused it to dough down. broadcasting live in the united states and around the world, this hour, you are watching "cnn newsroom." this is 100% useful for a 100% fresh mouth. what's it like to not feel 100% fresh? we don't know.

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welcome back to our viewers here in the united states and around the world, you are watching "cnn newsroom." it is good to have you with us. i'm george howell with the headlines we're following for you this hour. new clues about what happened aboard egyptair flight 804 just moments before it crashed into the mediterranean sea. cnn has learned smoke alerts went off near the cockpit, but it is not clear if that means there was a fire. searchers have found luggage, seats and human remains in the mediterranean. but the flight data recorders are missing. in washington, d.c., secret service shot a man near the white house an he brandished a

gun. sources to the situation said the man was shot in the stomach. the president of the united states was not at the white house. the presumptive nominee said that democratic rival harrisburg clinton wants to abolish rights of americans to own firearms. donald trump made that claim after being endorsed on friday by the national rifle association. clinton said the attack is completely false. >> the notorious mexican drug lord el chapo is one step closer to being tried in the united states. guzeman's lawyers are expected to appeal the decision. he'll face federal charges if he's tried in the u.s. officials are hoping new detail from the egyptair flight will help them to figure out what went wrong with the plane. cnn's john berman gets us caught

up on what we do know and we don't know so far. >> reporter: day two of an intense search and recovery operation over the mediterranean sea. a european space agency satellite may have picked up the biggest clue on 804's location so far. a mile-long oil slick in the water, around the area where the plane dropped off the radar. it's too early to tell if this is from the missing plane. search crews are investigating. also possible debris has been picked up by the egyptian military. personal belongings and aircraft parts, including seats, were recovered from the water, along with human remains. that's according to egyptian authorities. until the plane is found and the black box is recovered, by this plane crashed will remain largely unknown. >> we cannot make any speculation for the time being because there is no evidence of any -- any proof whether this is one thing or the other. >> reporter: still, u.s. officials believe terrorism is

the likely cause. though no group has claimed responsibility for bringing down the plane. investigators are looking into, what, if any, role the crew may have had in the plane's disappearance. there were ten crew members on board. the captain mohammed shoukair has a good reputation. his co-pilot had more than 2700 hours of flight time. his uncle described him as a good sense of humor. >> he was the only one -- so what happened is really very much unfortunate. >> reporter: at this mosque in cairo, a prayer service for the dead. this grieving man said he lost four relatives on board the flight. 66 people in total were on the plane. the passengers were from a dozen countries around the world,

though, most were egyptian and french. family members met with egyptair officials who say they are still in the process of notifying next of kin. >> that's john berman reporting there for us. now, some experts speculate that the plane was tampered with at some point before taking off from paris. flight tracking data shows that uniting 804 was both in eritrea and tunisia earlier wednesday before a routine maintenance check in cairo. jeffrey thomas editor in chief at airlinerating.com joins us live. jeffrey, it's good to have you with us. i'd like to start by talking about four different scenarios that investigators are looking into. the first, a smuggled bomb, the idea of terrorism. what are your thoughts? is that possible? >> if it is a bomb, we simply don't know that yet, and the

u.s. believes that terrorism is involved likely in that scenario, yes, it could well and easily -- more easily, i should say, been smugged on some of the earlier stops this plane made. eritrea, tunis and tunisia, it stopped twice there before going back to cairo and charles de gaulle. i think it would be more difficult to smuggle a device on at charles de gaulle so there's a body of opinion suggests that some area placement of such a device if that turns out to be what happened is possibly more likely. >> so you talk about the second scenario, the idea that someone on the ground at charles de gaulle could also have been involved. let's talk about this other possibility of a technical issue on board the plane, given the new information that we have.

>> yes, the new information comes from the acars system which sends, if you like, a telex-type message to the airline. this is in realtime, they would have had this as it was happening. this indicated smoke in the lavatory, smoke in the avionics bay. also failure in the electronics systems and also some other electrical system has gone down. there's about six messages, then it cuts out. now, that could be simply the result of an explosion within the aircraft itself. now, one of the most telling things here is the violent turn that this plane made before it plunged town to the sea. now, this would indicate a loss of control surfaces, possibly the vertical stabilizer, one of

the horizontal stabilizers being ripped away and that certainly would have been bomb relate which would have triggered out the acars system as various systems failed in the aircraft. >> geoffrey, the fourth scenario, this concept of pilot error, your thoughts there. >> yes, the pilots seem to be reasonably well credentialed. i don't believe it would have been pilot error. it might have been possibly -- i mean, it may have been a struggle between the pilots. it may have been one of those german wing scenarios if you like. i don't believe that was the case. i tend to think it was the explosive device which triggered a range of failures, which is what the acars messages are all about. >> we had another gentleman, an expert in aviation with us the

last hour. i'd like to ask you the same question i asked him when it comes to the descent. when you're talking about being at 37,000 feet. then the quick descent, the swerves going down to 10,000, so on, so forth. does that sound to you like a controlled descent, or a plane that was out of control? >> it was terribly out of control. there was knowledge controlled about that. given the information that we've got of the severity of the turns, there was no control whatsoever. and, of course, indicated by the acars that said that the autopilot had failed -- one of the control systems had failed. so that the kaes that something catastrophic had occurred so there's no control. >> but, geofftry, i want to ask you, though, on the theory that perhaps the pilot was trying to get lower so the passengers on board had more oxygen.

your thoughts there? >> well, if you wanted to get lower, you'd simply put the nose straight down. you'd go straight down. you wouldn't need to do twists and turns or anything like that. that would actually slow your decent if anything. >> geoffrey thomas thank you for being with us this hour. we'll stay in touch as we learn more details it's always good to get insights from experts to to understand what happened here. this is "cnn newsroom." still ahead irk the nigerian military said this girl was the second tribal school girl to be rescued from boko haram. activists are disputing this claim. plus, hundreds of protesters storm baghdad's green zone. for the second time in less than a month, iraqi security forces respond with tear because. the story as "newsroom" continues. charge! so why would you invest without checking brokercheck? check your broker with brokercheck.

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welcome back. a nigerian girl freed from boko haram captivity on thursday may not be one of the chibok schoolgirls after all. local activists are disputing the military claims thisara luka is the second girl to be released. they do rejoice all the same. she was among 90 women and children rescued. david, it's good to have you this hour. nigerian officials are saying it doesn't matter if she was abducted in the game group, but, rather, her freedom is another victory ford boko haram. >> reporter: that's right, george. they are saying any person taken away from boko haram is a

victory, but they didn't initially put out initially that this was one of the chibok girls sparking confusion. but they say that she is not knack one of the 200 girls taken more than two years ago by boko haram by the secondary school which sparked outrage which drew attention to the terror of boko haram and the kidnappings that have been going through. more than 2,000 women and children have been taken by this terror group according to amnesty international. and the human toll on that part of nigeria and neighbors countries has been massive. and there does seem to be some victories against boko haram, with the first girl being confirmed to be among the 200 chibok girls who managed to escape. and certainly, anyone we've spoken to says that any life is

worth rejoicing if they get out of the clutches of this group which treats those girls and women hideously in terms of stronghold. george. >> so many of these schoolgirls and women abducted. owe what's happening next? >> reporter: well, the military saying they're going to push forward with the operations to try to clear the terror group out of the forest. what does seem to be happening now because of the aerial raids and on the round offensive that's creating some level of chaos in the camps where boko haram has been keeping these hostages and hunkering down from the multi-prong military attack. and that chaos often allows women and chirp aldren and even captors that have taken them to defect from boko haram and escape into the forest. many of these women are heavily guarded deep in the forest and it's difficult to go into a

major offensive because it might put the kidnapped women and children who effectively have become like human shields at risk. though there is an approach from the nigerians, cameroonians, and cadmeans to squeeze boko haram that have been helped by foreign intelligence. but many say the calls to the end of this terror group is very premature, there could be a long road ahead, but certainly, in the last few weeks there has been some positive news that this group is being reduced in its capabilities, george. >> david mckenzie live. thank you for your reporting. dozens of protesters were injured when they stormed into baghdad's green zone on friday. officials say iraqi security forces fired rubber bullets and tear gas at the demonstrators.

the country's military imposed a curfew on baghdad until further notice, according to state divisio television there. iraqi's prime minister promised a fast response. >> translator: what's happening today is storming the government's facilities and tampering with public property cannot be accepted for any perpetrators. the law must take its course with any transgressor. >> the shiite force muqtada al sadr urged similar protests last night to protest corruption there. israel's defense minister resigned on friday and warned of, quote, extremist and dangerous elements to take over the element. it came amid the shake-up that would have pushed him out of

this job. he was clashing with benjamin netanyahu. and the prime minister downplayed any tensions. >> translator: the act of replacement in the minister's positions did not come out of a crisis of fate between us. it came out of the need to expand the government, to increase the stability in israel, because of the big challenges it faces right now. i assume that if alan was not asked to leave the defense ministry to move to the foreign ministry, this crisis of faith would not have occurred. >> the prime minister benjamin netanyahu warned he wanted him to stay as prime minister but he refused. this is "cnn newsroom." still ahead -- forensic labs are equipped to unravel pretty baffling cases. we'll see how they'll approach the mysterious plane going down

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welcome back. early reports are that egyptair flight 804 sent out a series of error messages before crashing. and they have been confirmed now

by french aviation officials. the alerts indicated smoke on board the aircraft. but the agency stressed, the messages don't say anything about what could have caused those alerts to go off. it added, that the main priority now, is finding the flight's recorders. that could hold valuable information. to this growing puzzle, including cockpit voice recordings and data readings. forensics will indeed be key to figuring out what happened to this flight. investigators hope to retrieve enough debris in the plane to piece together what went wrong. but circumstances of the crash are sure to complicate an already difficult job, kyung lah made a trip to the lab. >> reporter: it's in the wreckage of egyptair flight 804 that versuses will inspect for evidence of a possible explosive device. >> if we compare the sides

there's a difference, there's a very dingt difference. >> reporter: balki iwalking us this bomb research lab thomas anthony said investigators look for telltale marks of each type of bomb. >> c-4 is very adaptable for the purposes of terrorists. because it can be formed into shape. >> reporter: c-4 doesn't burn? >> it does not burn. it releases its high-temperature, and high-pressure gases through shock. look at the edges here. the edges of the black powder are very, very different. they have almost a coral-like look to them. this is napalm. look at the residue of anyway na napalm left behind. this is something indicative of napalm. >> reporter: other types of explosives? >> there are dozens of types of explosives. in the view of the terrorist, a terrorist is likely to follow up

a likely to follow up a success with a similar form of attack. >> reporter: last october metrojet flight 9270 crashed aboard the sinai peninsula killing all on board. and using explosive material hidden in a soda can. it shows wires and a detonator with an on and off switch. cnn cannot independently verify the authenticity of the pot. as relatives wait for the agonizing search, it if it was an explosive, the direction of the blast and what type. but this recovery will be under water. like the air asia flight 8501 disaster in december 2014. potentially eroding some of the evidence, but not all of it. a lab can still detect evidence under water, each on melted

steel. anthony says it's critical to have forensic proof in an aviation investigation. but just as important, the investigation beyond the wreckage. >> not what happened only. but how it happened. so that that vulnerability can be identified and fixed. >> reporter: kyung lah, cnn, los angeles. >> insightful look at what investigators will be dealing with. again a this search continues we understand that human remains and luggage have been recovered. we know as that families are being notified. and the new information that smoke alerts went off near the cockpit. that wrap this hour of "cnn newsroom." i'm george howell at the cnn center in atlanta. "new day" is next. for our viewers around the world, "amanpowur"amanpour" sta moment. thank you for watching cnn, the world's news leader.

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piecing together the mystery. new clues emerge on what was happening aboard egyptair flight 804 moments before it crashed into the mediterranean. donald trump goes after hillary clinton on guns with a questionable claim about your second amendment rights. >> she wants to abolish the second amendment. she wants to take your guns away. and changing of the guard. an interim police chief is installed in san francisco after his predecessor resigns over race and controversy. "new day" starts right now.