katy us. coming up this hour -- [ gunfire ] >> intense fighting in ukraine. now respects the united states take a more direct role in the crisis. buried. another record-breaking thunderstorms hammers cities from chicago to boston. flash freezing make things worse. also an urgent warning from the cdc on the measles vaccine

as some top politicians weigh in. what the medical experts are saying. there have been rumors, there have been concerns. there have been questions. >> all of those stories coming up this hour. we begin with the crisis in ukraine. senior u.s. officials are debating whether to provide defensive weapon to government forces battling pro russian rebels. those arms include anti-tank and an i aircraft weapons systems -- anti-aircraft weapons systems as the system intensifies in ukraine. >> there's increasing pressure from washington to take action. as we report there are major drawbacks to consider. >> reporter: shelling fighting civilian deaths escalating as russia expands its influence inside ukraine. now from some top u.s. officials, we hear shifting

tone internal discussions, support in military leadership for the u.s. and its allies to do more. arm ukrainian forces with defensive but lethal aid. >> we haven't taken options off the table. >> reporter: the president said this in india last week -- >> i will look at all additional options that are available to us short of military confrontation. >> reporter: the tricky question, though, would arming ukraine end up a deterrent or stoke the fire into a proxy war with russia as the white house has worried. a group of foreign policy experts including former administration officials just put out a report calling the situation critical urging the u.s. and nato to directly arm ukrainian forces including anti-armor missiles. >> the proposal is not to give ukraine enough to bet the russian army. we can't do that. but we want the ukrainians to be able to raise the costs of

aggression to the russian military so the russians consider the costs too high and that takes away the option from russia of further agree, further escalation. >> reporter: in the words of uthe ukrainian -- words of the ukrainen president -- >> blankets night vision goggles are also important. but one cannot win the war with blankets. [ applause ] >> reporter: cnn, the white house. >> quite a powerful point there. let's take a closer look at the battle lines in eastern ukraine. according to the ukrainian government, separatist rebels control what you see highlighted in orange. heavy fighting reported there at donetsk. heavy shelling reported further south near mariupol and the black sea:the united states has been using economic sanctions to discourage russia from

supporting rebel forces inside ukraine. while senior officials consider sending arms president obama's deputy national security adviser says not so fast. >> we don't think the answer to the crisis is simply to inject more weapons and get into that type of tit for tat with russia. we think the answer is to squeeze russia apply pressure on russia, try to get them to the table with those separatists so that we can see a peaceful deescalation. >> and as that debate over what will these weapons achieve heats up separatists are gearing up for much more fighting. >> on monday the leader of the self-proclaimed people's republic of donetsk announced a drive to recruit 100,000 new fires, even as civilians across the region struggle to salvage what's left of their homes and lives. >> russia of already unhappy with u.s. policy in ukraine. at the half-hour, we'll get reaction from moscow to these latest reports of possible u.s.

involvement. stay tuned for that. another story we're watching, cuba's state-run media has published what it says are new photographs of fidel castro. the newspaper says the pictures on its website with just over two weeks ago and were taken before the former leader published an article about u.s. and cuba restoring diplomatic ties. we have more from havana. we haven't seen photos of him or heard word of him until recently since the historic announce that cuba and the united states -- announcement that cuba and the united states would restore diplomatic ties. that began the rumor mill again that perhaps fidel castro was unable to comment, that he could not be perhaps seen in public because of some sort of illness. and that continued on for some time. then we did get a comment from fidel castro getting his tentative approval to the deal that his brother, raul castro, struck with the u.s. to restore

diplomatic relations. that wasn't enough. now we'll see -- more than 20 images that appear to have been taken in recent weeks. looking at the photos you see newspapers and television programs. kind of give a sense of when they were taken. we'll see if the new images do silence some of the doubters. >> reporting from havana cuba. fidel castro's last public photo was in august. now this story -- another al jazeera journalist could be freed. it's believed the release of mohammad fahmy could happen in days. two journalists were arrested more than 13 months ago and convicted of aiding the banned

muslim brotherhood. this after australian reporter peter greste of relieved. he had a mix of emotions and had no expectation of being freed. >> i can't tell you how relieve i am at being tree. i really didn't expect it. we were settling in for a period of months behind prison for the retrial. to be out today with just a few minutes minutes' notice is extraordinary. amidst the relief i feel a sense of concern, a sense of worry. if it's right for me to be free it's right for all of them to be free. >> peter greste there. a big story in the united states, a record breaking storm has robbed the northeastern area. >> monday in vermont, one

snowplow of involved in a wreck. q1 person was taken -- one person was taken to hospital for observation observation. >> people in boston dealing with heavy wind and freezing cold weather. they're beginning to dig out after heavy snow blanketed most of massachusetts and other pars of the northeast. 16 inch or roughly 40 centimeters fell on monday alone in boston. our meteorologist jennifer gray is there. >> reporter: not only been the snowiest seven-day stretch, it has been the snowiest february 2nd on record. they have also received more snow since january 1st than they normally receive in an entire year. just to give you an idea of how much snow they have gotten. of course we were here talking to you last week. they received about a meter of snow. they've received about 40 centimeters during the last 24 hours. look been me -- look at the snow piles. the plows have been coming by trying to get the snow out of

the way. it's piling up on the sides of the street. then the streets are also a slushy mess. you see over here, we actually had a wintry milk earlier in the afternoon. as cars go by you see the slush. as temperatures plummet to the single digits as we go through the overnight hours, we are expecting a flash freeze. dangerous travel through the next couple of hours. of course temperatures are well below freezing. >> well below freezing. not a good scenario. meteorologist pedram javaheri joins us to detail how difficult the days ahead will be. freezing, you know mean -- freezing ice, that makes transportation almost impossible. what are they up against? >> anything liquid whether it's chemically treated, salt has been put, tens of thousands of salt poured across new york into boston in recent days. anything that's melted even with the chemical treatment, we think will refreeze as flash freezing concern is quite high with 12 fahrenheit in boston. 13 fahrenheit across new york

city. talking about minus 11 11 celsius. boston had been hammered. jennifer touched on this. 43 inches 110 smears of snow in any given -- centimeters of snow in any given year. in the past seven days exceeding 40 inches. in the past ten days boston has put a record over the region with over 47 inches. a year's worth of snowfall in a ten-day stretch across boston. of course chicago has been joining in on the act, as well. fifth largest snowfall in history. detroit coming in top three. cleveland has picked up a fair moon of snow as well. now the sky's beginning to clear over the region. and the concern, of course is the wind's going to be howling. 25 to 35 miles per hour into the morning hours, another shot of windy weather pushes in. and i don't foresee much in the way of warming in the next five to seven days. here's what it feels like outside. minus one fahrenheit. minus five is what it feels like in boston. so this is really going to be a major issue across the roadways.

windchill warnings in place across interior new england of minus 25 to minus 35 degrees. if your kids are going to school, as far as i've heard school cancelations have not been placed. if you're at the bus stop exposed skin going to be a damage with those temperatures. >> extreme calling. >> sounds painful, the temperatures. >> it is yeah. >> thanks. japan vows to raise its fight against terror as it mourns the isis killing of one of its own. ahead we'll show what other countries with citizens help of isis are pledging to do. a u.s. outbreak expands. the discussion intensifies. ahead, a closer look at measles and whether vaccinations should be mandated. go! go! go! he's challenging the very fabric of society. in a post cannonball world! was it grilled cheese? guilty! the aquatic delinquency is a larger issue to this ♪

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u.s. president barack obama tells nbc that he is working to fine an american woman health by isis. >> this as japan mourn the killing of kenji goto and there's clmorring for any clue of the pilot held by isis. barbara starr on the captured airman, force to free him, and heartbreaking wait. . >> reporter: outside israel, a rally against terror. the jordanian government still

pressing to get its pilot free from isis. >> proof of life that we have asked for did not come yet. >> reporter: ominous silence from isis which never publicly offered to release the pilot in return fora is the suicide bomber held in jordan since being convict of a series of hotel bombings in 2005. >> isis seems to be in touch with somebody in the jordanian government. we haven't really had that line of communication before. >> reporter: the u.s. following all of this closely as an american aid worker remain an isis hostage. something the reluctance the white house has -- something the white house has been reluctant to talk about. >> do anything we can to ensure that any american citizen is rescued from this situation. >> reporter: isis apparently undeterred, releasing new propaganda pictures of what it says is an assault on iraqi army

posts west of baghdad. for isis gains and losses. >> they're losing ground in iraq. they're maintaining ground in syria. they're getting their recruits coming from overseas. >> reporter: outgoing defense secretary chuck hagel telling cnn isis is still expert at exploiting social media. >> this is as sophisticated a terrorist group as we've ever seen. the sophistication of their social media. we've never seen a terrorist group like isil just from that dimension. >> reporter: for the family of the jordanian pilot, a terrible wait for news. >> we can eat. we can't sleep. we can't do anything. our life has stopped. >> reporter: u.s. military officials continue to say the top priority is not syria but iraq. hoping to push isis back there enough so iraqi forces can make their move to try to retake

territory, but there is a good deal of doubt about how soon they may be able to do just that. barbara starr, cnn, the pentagon. now some news out of northeastern nigeria. at least one suicide bomber struck outside a stadium on monday shortly after president goodluck jonathan left a campaign rally. >> nigerians will go to the polls in less than two weeks. no one has claimed responsible for the blast. the area had faced repeated attacks blamed on boko haram. it become a campaign issue -- it could become a campaign issue. coming up, what potential presidential kenya are saying about the out-- candidates are saying about the outbreak of measles in the u.s. ee medicines to take on your worst pain and fever, cough and nasal congestion. it breaks you free from your toughest cold and flu symptoms. theraflu. serious power. the future of the market is never clear. but at t. rowe price we can help guide your retirement savings. our experience is one reason 100% of our retirement funds

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welcome back whitney houston's daughter is in a medically induced coma after being found in a bathtub over the weekend. >> a source close to the family said brown curbed seizures on monday and opened her eyes a few time. doctors don't want the family to read too much into those moveless. so far, no word on what caused the incident. here's another big story we're tracking. u.s. health officials say 102 cases of measles were reported in 14 states in january, and most were linked to people who visited disneyland in december. >> the outbreak has renewed the discussion about vaccinations

and public health. and as jake tapper reports, politicians are weighing in. all i can say is that i -- we evacuation night ours. i -- vaccinate ours. i understand parents need a choice, as well. >> reporter: to potential 2016 contender governor chris christie entered the fray of the raging debate over the childhood measles vaccine. >> i didn't say i believe in the option. i'm saying you have to have that balance in considering parental concerns. >> reporter: the new jersey governor made his remarks in london about whether parents should be able to not vaccinate their children. also this morning, another 2016 potential hopeful, senator rand paul threw his opinion into the ring saying most vaccines should be voluntary. >> while i think it's a good idea to take the vaccine, i think that's a personal decision for individuals to take. >> reporter: both sometimes seemed in contrast with president obama on nbc who minced no words. >> there is every reason to get

vaccinated. there aren't reasons to not -- >> are you telling parents you should get your kids vaccinated? >> you should get your kids vaccinated. >> reporter: the medical community says the question of whether or not parent should vaccinate their children is not up for political debate. it is better left to science, and the science is clear. getting your children vaccinated preens disease. accord -- prevents disease. according to the centers for disease control, ahmong children in the u.s. age 2 to 21 vaccination will prevent an estimated 322 million illnesses and 732,000 deaths. >> i believe vaccinations triggered evan's autism. >> reporter: some high-profile spokespeople have launched a public movement against childhood vaccinations based on the false and discredited theory that vaccines in some way cause autism. >> we deserve safe shots. and a safer schedule. >> reporter: the medical and scientific communities are very

clear on this. . there are no links, they say. >> there have been rumor. there have been concerns. there have been questions. there's a huge evidence base now that the mmr vaccine is not linked to autism. >> reporter: but the quackery built on the tragedy of a rise in autism diagnoses has propelled an anti-vaccination movement, one that is now linked to the spread of preventable contagious diseases that can kill. >> choosing not to vaccinate your child also endangers the health of others in your community. >> reporter: a recent outbreak of measles that began at disneyland now accounts for most of the 102 measles cases spreading across more than a dozen states putting the most vulnerable at risk. those kids too young or too sick to get immunized are the most in danger. the science and medicine on childhood vaccines recommended by the cdc is settled. but the presidential contest may

inject some serious ignorance into the bloodstream of this important public health issue. jake tapper, cnn, washington. that's really what this seems to come down to. a certain level of ignorance. globally the world health organization says the measles vaccine has helped save millions of lives. despite that progress measles still an issue in developing countries particularly on the african continent and south asia as you see on the map. fewer than half of all infants receive the measles vaccine in the countries you see in red. if you can make it out. children in the countries in orange don't fare much better. the immunization rates between 50% and 7 %. >> the -- 79%. >> the measles vaccine is much more available in the countries in yellow and in blue like the united states, more than 90% are immunized there. arthur caplan heads the division of medical ethics at new york university's medical

center. i spoke with him about how to clarify the message and ease fears about vaccines. >> i think you have to do two things to convince more americans to vaccinate. one is you have to calm their fears about autism. that still linger. it's not true but it is a worry. the other issue is somehow people think it's somehow unnatural or even poisonous to put vaccines in your body a small number do. i think there they have to understand the same things in the world, measles, the flu these are thing we use small bits of to build immunity. there's nothing unnatural about what's in a vaccine. >> if they can't be convinced with that message, what about the numbers -- they're shocking. 250,000 cases of measles last year. half of those were fatal. so what to people need to do to guard themselves and their

family? >> worldwide, measles is still a major problem. if you have other illnesses, if your child is malnourished measles can be fatal. that's where we get the high numbers. what you have to do is first and foremost make the measles/mumps/rubella vaccine affordable. it's not everywhere. we need to drive the price down. foundations and governments need to do that. you need to get it to people. you can't be protected unless someone comes with the vaccine and is able to give it to you. so we have to do that as well. >> now, this controversy over whether or not to evacuation night is nothing new. >> no. elizabeth cohen has more. >> reporter: if you're a doctor in america, chances are you've never seen a case of measles, now some 36 years after the last case of crippling pair littic polio in this country, the sthoel recomercedez-benz childhood -- centers for disease control recomercedez-benz

vaccines for more than a dozen diseases. you would be wrong to think it's actress jenny mccarthy who started the controversy. the first vaccine users were in 19th century london. parents arguing that mandatory vaccine laws violate their freedom. today's refusers holding on to the but bunked myth -- depunkbunked myth that vaccines cause awe tim. they prefer their chile get the disease even if there's a risk they could die. >> someone who had polio became the president of the united states. if we load these kids up with vaccines and turn out to be autistic or have brain damage from it they may not even leave the house. >> people used to die from these diseases that we can now vaccinate against. why wouldn't you want to save your child? >> i'm not going to try and inject him full of chemicals and rick the vaccine-induced damage. >> reporter: science is on the side of vaccines. it's a very old debate in the middle of a new and growing measles outbreak. libya co--- elizabeth cohen

reporting. >> it seems that it's a first world problem. forgetting how deadly the disease is and how difficult it is to actually manage. >> absolutely. i've known a number of people who have refused to have their children vaccinated. and you can't convince them. they think it's putting something alien in the body like we were hearing there. there's also this link that some people have made to autism -- >> that's discredited. >> it's discredited. the study does not stand anymore. it's difficult to re-educate people. you know people make sure -- they need to make sure because polio particularly, it's deadly. and -- you know it paralyzes children. >> when you deal with your kids it's a highly emotional topic. the debate unfortunately will continue. >> need to research these things. how about something much lighter here -- one again, the super bowl is the most watched broadcast event in u.s. history. according to nbc, more than 114.4 million people. let's say roughly 114 million people tuned in to watch the new england patriots defeat the

seattle seahawks in super bowl xlix. >> the big game also broke social media records with more than 28 million tweets during the game and the halftime show. how about that? >> that was including one of mine. one of mine. meantime the new england patriots, they're back home. the team touched down just a few hours ago in fact in boston massachusetts. likely a shock after leaving the warm arizona sunshine. >> boston's mayor has postponed a parade for the patriots because of that wicked weather of course. the celebration will now be held wednesday. quick break now. just ahead, an exclusive look at the devastation in donetsk. a state of the art airport reduced to rubble in a matter of months. kiev battles pro russia separatists. an exclusive investigation reveals a major security gap at u.s. airports. we'll look at how easy it is to get a weapon on board a plane. female vo: i actually have a whole lot of unused vacation days, but where am i gonna go? i just don't have the money to travel right now.

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xfinity is perfect for people on the go. welcome back, i'm bornerrol barnett. >> i'm rosemary church. >> the release of jeff ranieri journalist mohamed fa me from fa -- fahmy may happen in months. peter greste of released is not. cuba's state-run media has published what it says are new photographs of fidel castro. the newspaper says the pictures on its website are just over two weeks old. they show the 88-year-old and his wife speaking with a student

at the university of havana. the paper says it released the images because "all of cuba is impatient to know castro is alive and well." he has rare low been seen in public since -- rarely been seen in public since retiring for health reasons. the u.s. is considering providing defensive weapons for ukrainian force fighting pro russian rebels in the east. the separatists are trying to take over the regions including donetsk. monday announced a group of 100 fighters. the battle is taking a heavy toll. that's especially clear at the once-bustling airport in donetsk. >> nick paton walsh traveled there for an exclusive look at the damage. we have to give you a warning here -- you may find parts of his report disturbing. >> reporter: nowhere has the fighting been fiercer in the worst war to hit the europe since the balkans have been

here. donetsk's once proud national airport. [ explosions ] >> reporter: ukraine's army is still shelling here. despite being pushed out of this former stronghold two weeks ago by these russian-backed separatists themselves heavily armed, this is their form of airport shuttle. we're moved toward the new terminal of the airport. territory which the separatists have taken but is still regularly under fire from the ukrainian military. we pull into the airport long-term underground parking. there are occasionally shells still landing here. the fight here killed hundreds as ukrainians used service tunnels to hold parts of the

complex. the men claim these bodies were left in the ukrainian retreat. the last call for passengers on this walkway passed months ago. these pictures from three years ago showing how it used to sparkle. hard to imagine how just six months ago we were here flying out of donetsk. this that was then a state-of-the-art international terminal. just look at the destruction and how this symbolizes how far eastern ukraine has fallen. mortars often fall here, so we move fast. they used to call this the new terminal. opened two years ago for football fans coming to the european championship. that newfound european optimism has evaporated. the war here sender itting a new -- is entering a new phase. the heaviest of weapons and random shelling of civilians in

which victory has become more important than its spoils. these men blame barack obama for this devastation. russia blames nato for fermenting this war. nato says nonsense and that many of these fires are actually russian regular army. blame, hatred and charred remain everywhere. but ukraine's bright hopes of modern prosperity, the gate is closed. nick paton walsh, cnn, donetsk. let's get the view on all of this from russia now. our matthew chance joins us live from moscow. matthew you look at nick paton walsh's report from donetsk, it is literally a war zone. so as we discuss this -- this issue of western powers essentially looking to beef up the capability of the ukrainian military to fight back the major unknown is how president putin, where you are, will

react. what is the reaction coming from the kremlin today? i know it's always a difficult thing to predict what putin will to. >> reporter: it is although all the signs we've had so far since this conflict erupted about a year ago is that vladimir putin, the russian president, will to anything it takes to make sure the pro russian rebel are not defeated boy the government forces on that battlefield that we saw illustrated by nick paton walsh. at the hands of the kiev forces he's bolstered them with weapons and troop, although of course the kremlin denies that. he's provided diplomatic support as well. so there's every indication that if the united states or other countries were to ship arms to the authorities in kiev the russians may match that and it may lead to an escalating crisis, an escalating conflict

in ukraine. at the moment there's been no actual reaction to that debate that's raging in the united states about whether or not to supply the ukrainian government with lethal aid. but the country's foreign minister, sergei lavrov is visiting beijing to meet with counterparts from china. they say the united states is biased toward authorities in kiev. take a listen. >> translator: there has been confirmation that the u.s. was directly involved from the beginning of this anti-governmental coup d'etat. president obama literally called it the transition of power. secondarily i'd like to note that this rhetoric shows washington's intention to continue doing everything possible to unconditionally support ukraine's authorities who have apparently taken a course toward military solutions to the conflict. >> reporter: so sergei lavrov

there the russian foreign minister. essentially saying it's almost expected from a russian point of view for the united states at some point to step in and -- and provide whatever support it can to the ukrainian government. >> so in some ways this isn't anything new, and you will think that russia has a plan. the strategy, if you listen to u.s. official though appears not to use these weapons now change the balance of power, to make it too costly to difficult for russia to continue to intervene. do you think a move like this if the u.s. did provide lethal weapons to the forces in ukraine would it deter russia make it slightly more difficult? >> reporter: well, it's a huge risk not? it? the idea that if you -- isn't it? the idea that if you ship lethal aid, weapons to one side of this conflict that's going to be the end of the conflict. it's going to mean that the russians think the price is too high for us to continue pushing strategic aims in the country. it seems, you know a big risk

to say the least that the supply of weapon to the ukrainian government is going to end this conflict. the other side of that risk of course, is that the russians match that supply. they bolster the forces, the pro russian rebels inside ukraine. they may stage an overt invasion of eastern ukraine. and so the possibility is that the supply of weapons into that civil war, actually escalate the conflict. it's already seen the death of 5,000 people or more. hundreds of thousands of lives in ukraine are at risk of an escalateing conflict, a much broader conflict. >> yeah. you get the send that no oneness to an escalation of what's already been so violent and deadly. matthew chance live for us this morning in moscow. thank you very much. we're just getting information in, this is via reuters. cairo airport has heightened its security measures. this comes after police found two bombs, and this was in two

different terminals in the main airport there in cairo. now at this point we understand that they actually detected these bombs using electronic devices. that was early on tuesday. no arrests have been made at this point, we understand. and -- they are actually going through video footage to try to determine who may have planted these bombs. just repeating there, we understand that the cairo airport in egypt, security has been heightened, and this is because of these two bomb they have found in two different terminals in that main airport in cairo. at this point no arrests have been made. they are trying to investigate this and trying to work out who would have left these bombs. we'll keep an eye on this story, of course and will bring you the details as they come in. >> of course airport security something all of us will be and are concerned about. we continue that theme coming up. security officials screen thousands of passengers a day in

airports across the u.s. but a key question is do those employees get screened as well? a cnn exclusive investigation has the answer, and it may surprise you. financial noise financial noise financial noise i bring the gift of the name your price tool to help you find a price that fits your budget. uh-oh. the name your price tool. she's not to be trusted. kill her. flo: it will save you money! the name your price tool isn't witchcraft! and i didn't turn your daughter into a rooster.

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♪(don't fear my darling...) (the lion sleeps tonight.)♪ ♪(hush my darling...)♪ man snoring ♪(don't fear my darling...)♪ ♪(the lion sleeps tonight.)♪ woman snoring take the roar out of snore. yet another innovation only at a sleep number store. developing now in cairo, egypt authorities saying a homemade bomb went off near a busy city square. so far no report of casualties. there's also been a security scare at an airport after police found two bombs there.

we talked about that just before the break. i want to bring in ian lee who's joining us on the phone with more. ian, let's talk first about this bomb that went off. what information have you got on this? >> reporter: i'm at the site right now. it's about a half a kilometer away from the central square tahrir square. heavy security presence right now around the area. the bomb looked like it smashed out windows, damaged areas on the buildings. we're hearing no one of injured or killed in this attack that's coming from the ministry of interior. but a very tight security presence now. egypt has been on a heightened state of alert with the recent killings of the soldiers from the sinai peninsula. just about 200 meters away from where the bomb went off, there's a very heavily armed security checkpoint, though this is -- this is a bomb that may not have injured anyone but it shows

that -- people who plant these militants can target the center of cairo. right now we're seeing police dogs going around sniffing for any other explosive devices. >> ian, do authorities know who specifically or what group specifically is behind this bomb? >> reporter: snow one knows yet. no -- no one knows yet. no one has claimed responsibility. this is not uncommon around cairo and egypt where you have a small explosive device going off. small explosive devices being found crudely made homemade bombs where no one is injured. and usually we don't see people claim responsible for these smaller bombs, smaller attacks. >> and ian, perhaps coincidentally we don't know but these two bombs we talked about before the break were found at two terminals at the main airport in cairo. what information do you have on that and is there thought to be

any particular link between these two incidents? ripe it's too soon to tell if there's any link between the incidents. what we're hearing about the bombs, they were planned at an old terminal. cairo airplane has three terminals. two that are active. one, an older one, the police were able to find it were able to dismantle the bombs. there's tight security at the airport. this is really going to damage be a blow psychologically for the egyptian police and the tourism here because thousands, millions of tourists come across that airport every year. the egyptians to not want to have headlines of bomb going off. even -- even bombs being discovered even if they are small and crudely made. also there's security at the airport has always been fairly tough. so the fact that these two

devices could be brought in to the airport is something police will have to review their own security strategy. >> all right. we will stay on top of that story at the airport and of course the explosion. you've been reporting, ian lee in the streets. we know that bomb just went off about a half kilometer from tahrir square. it smashed windows there. there's very tight security now on the ground. this explosion in central cairo, it's not uncommon as ian lee pointed out. not un: for bomb to be planted -- not uncommon for bombs to be planted and explode in this situation. of course there's been very very high security at this point in egypt. we'll stay on top of that story, on top of the bombs at the airport and be back in a moment. what the cloud enables is computing to empower cancer researchers. it used to take two weeks to sequence and analyze a genome; with the microsoft cloud we can analyze 100 per day. whatever i can do to help compute a cure for cancer,

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before the break, we were telling you about the cairo airport in egypt. it's got heightened security measures in place. this after police found two bombs at the terminals there. and we were also telling you about an explosion. this of just near tahrir square about half a kilometer away from tahrir square. critical part of cairo. the central -- central cairo. that explosion went off, blew out some windows there. we don't know -- no one has claimed responsible at this point. we're talking about very high security at that part of the city and, of course there at

the airport. there's no suggestion at this point that those two incidents are linked in any way. we just don't know at this point. we will stay on top of this story and bring you more details as they which in to us. the bombs found at the airport were not detonated in any way, security worked in that situation. for anyone who travels internationally, this is an important thing to note. a cnn investigation is revealing a serious gap in airport security in the u.s. this follows a high-profile days in atlanta where agents broke up an alleged gun smuggling operation arresting a delta airlines backage handler and -- baggage handler and passenger. >> there are two standard at american airports. one for passengers and another for employees with access to secure areas. cnn has more. ♪ >> reporter: at miami international airport, this is

the security you don't see standing in line. cnn got exclusive access to the screening that takes place for what they call the back of the airport employees. these are the baggage handlers the mechanics, the cleaners anyone you don't see going through screening with passengers. it's the same screening, no matter what kind of security badge or security clearance the employee holds. >> i.d.s are not enough to stopmish us on intent. -- stop malicious intent. you can look at backgrounds, but it's not necessarily going to prevent them from carrying out some malicious activity against an airport. >> reporter: what may surprise you is what's happening at miami's national airport, the full screening of every airport employee is the exception, not the rule. cnn contacted 20 of the major airplanes across the country and

found screening of employees is random and partial at best. and no national standard exists. the only other major airport that does full screening is orlando. many airplanes like seattle's sea-tac telling us an extensive background check and airport security badge is all that's needed for employees to get on the tarmac and gain access to airplanes. it's a similar story we heard from dallas san francisco, mccarron airport in los angelesas vegas los angeles, even j.c. john f. kennedy. there's not the same screening as passengers face up top. airport official told cnn the cost of screening all employees is simply too much for their budgets. security expert wayne black says relying on badges for security is stupid.

>> you don't have to be a security expert -- i mean a fifth grader can tell you that if you're checking security at the top end, at the fronten of the airport, you -- front end of the airport, you ought to be checking the back end of the airport. budget-driven security will always feel. >> reporter: the tsa which sets standards for airport security says that in the wake of the gun-smuggling case in atlanta, it is implementing or considering a range of measures including additional requirements for airport and airline employee screening. so far, no national changes. restaurant employees and flight crews that go through terminals do pass through a checkpoint those that work below do not. >> in the terminal we got to be careful with the bags. >> reporter: in miami, airport security director lauren stonever says checking some -- stouffer says checking some but not all employees is not enough. the threats at her airport are the same across the country -- smuggling, guns drugs, and the potential of terror. >> one of the greatest

vulnerabilities for this airport and any at mia is the insider threat. basically people who will gain credential and use their access to exploit the system. >> reporter: miami international has been screening like this since a drug-smuggling scandal in the late '90s. every employee with access to airplanes goes through metal detectors and screening. going to work, coming back from break every time, everyone. >> today's day and age -- >> reporter: if miami is an example for how security should be done the airport also has proof of why. last year alone, 209 employee i.d. badge were confiscated due to security violations caught by screening. >> we have intercepted guns drugs large sums of money, weapons, knives. >> worked with the current delta employees -- >> reporter: employee screening sunrise new scrutiny after the arrest of -- is under new scrutiny after the arrest of a baggage handler in atlanta.

the employee worked with a passenger to smuggle guns to new york. the baggage handler unscreened was able to take backpacks of guns into the airport where he passed them to a passenger already cleared through security. atlanta is now evaluating the cost of full employee screening. >> put it this way -- it's a costly program. it's really not that costly when you compare the costs versus the consequences of not having a program like this. >> reporter: drew griffin, cnn, atlanta. >> i'm rosemary church. we'll stay on top of the situation in egypt and bring you more details in the next hour. >> that's right. and i'm errol barnett. more of the biggest stories after this. and when you're in the know about your credit, you feel confident, ready for anything. at transunion.com you get instant credit alerts to keep you in sync. you can even lock and unlock your transunion report with the swipe of a finger. come to transunion.com. and get in the know.

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[ explosions ] fighting intensifies in ukraine. now the united states is considering taking its strongest stand yet. this little girl a poster chile for why doctor believe you -- child for why doctors believe you should get your child vaccinated and the message for from her mother. >> if you don't want to vaccinate your kids, don't take them to disneyland. and coming up, the second major storm in a weeker toless the united states and it's ---er to. s the you see, and it's not over. >> this is bang bang bang. hello, everyone, a big welcome to those of you watching here in the u.s. and all around the world. we're here for another hour of the world's biggest stories. i'm errol barnett. >> i'm rosemary church. we're following events in egypt. we'll get to this in a moment. first, this developing story -- cuba's state-run media just published what it says are recent images of fidel castro. the former leader hasn't been seen much since