aviation disaster. three french sports stars are among the dead in a helicopter crash in argentina. outrage and disgust after a police shooting claim the life of a minority teen in wisconsin. and the apple watch is finally unveiled. we'll ask an expert if you should buy it. hello, and welcome to our viewers in the united states and around the world. i'm zain asher. >> good to be with you, i'm errol barnett. this is "cnn newsroom." we'll begin with a developing story out of argentina. some crew and contestants of a reality tv show were killed after two helicopters collided midair. here's what we know so far. ten people were killed in all, that includes two olympic medalists from france. i want to bring in our jim bittermann joining us on the

phone from paris. jim, a lot of people in france are waking up to this tragedy. i imagine the reaction is one of shock and sympathy. >> reporter: i think so. in fact all three sports figures were well known here. in fact that was one of the reasons why they were involved in this reality television show. the idea behind the show called "drop" was to take well-known sports figures and put them into adverse situations and see how well they could survive. and so all three of these were very well known. perhaps the best known for the longest time of a singlehand ed singlehandedsinglehanded -- a french woman and also a three-time medal winner for

swimming. and then also on board was alexis vastine, a boxer. and he had also won a medal at the olympics. even president hollande had reaction saying he was saddened at the abrupt end to their lives. >> absolutely heartbreaking. ten people killed in all. two helicopters collided midair. this is about 720 miles from benz-- from buenos aires. protesters demanding answers in madison, wisconsin, after an unarmed american teenager was shot to death by police. they've been demonstrating since 19-year-old tony robinson was killed friday. >> his family says his death highlights the systemic targeting of young black men.

they want protesters to remain peaceful. here's our gary tuchman with more. >> we will not accept madison police department shooting one of our children. >> reporter: the basic fact is not being disputed. a 19-year-old biracial man was shot and killed boy a white madison, wisconsin, police officer named matt kenny inside this home. >> black lives matter! >> reporter: there are so many questions about why it happened. this past friday night a call came in to madison police headquarters that a disturbance was taking place on the street. as officers raced to the scene, they were told additional calls were coming in about the disturbance. one particular name was being mentioned.

ter: a man said he had been assaulted by robinson. >> the victim will be at 1146 willy street. the suspect's current iii gas station in the area. no shirt on now. >> reporter: 30 seconds later -- >> another call for the same suspect. went inside 1125 williamon street. tried to strangle another patron. >> reporter: the building with the red awning the man said he was victimized was waiting for police. down the street is the gas station where robinson was seen without his shirt. across from the gas station, you see police cars here. this is the house where it happened. the officer went to the door where the tarp is and that's where he fired the shots. a neighbor heard it happen. she says two brothers shared the other unit in the duplex. tony robinson of their friend. >> i heard this wrestling and things being knock over. my kitchen wall -- ceiling kind

of shook and the light. i figured somebody was going on. heard somebody go down the stairs and heard the shots. >> reporter: you hear the gunshots? >> yes. >> reporter: how many did you hear? >> four to six. >> reporter: robinson was pronounced dead at the hospital. the police chief said robinson struck his officer in the head when he went into the house. robinson has had problems with the law. he pleaded guilty to participating in an armed robbery in madison last year and was serving probation as a result. the man who shot him, officer kenny, has been placed on paid administrative leave. jim palmer is the police union executive director and represent the officer. did he have a taser with him, and why did he use the taser first? >> i believe that's something we won't comment on. typically i will tell you that an officer won't use a taser unless they have lethal backup. >> reporter: if he doesn't have someone else with the gun, you're not supposed to use you your taser in wisconsin? >> that's generally the policy

correct. >> reporter: an investigation is underinto the shooting death of -- underway into the shooting death of robinson. the union chief saying it will take a minimum of four to six months to complete. gary tuchman, cnn, madison, wisconsin. the way the police chief there some n -- there is handling this is very different from what happened in ferguson, missouri. they're coming out in front of the situation and releasing the officer's name involved. >> they don't want to see a repeat in any way, shape, or form. >> the protests have remained peaceful. the mayor says robinson's past won't have any bearing on the investigation, and they will get answers. listen to this. >> we are not going to put tony on trial. that's not what this is about. what this is about is finding out exactly what happened that night and to determine responsibility. we know that he was not armed. as far as the police chief and

are concerned the fact that tony was involved in any kind of transgression in the past has nothing to do with this present tragedy. >> madison's mayor there. an outside agency is investigating as is required by state law. >> there are racial issues in the u.s. you see it manifest in different places, in different ways. there's another big story involving race we can tell you about. foishls university of oklahoma -- officials at the university of oklahoma trying to figure out how to punish fraternity members who recorded -- they were recorded on a bus enthusiastically chanting racial slurs. >> so disgusting what they were saying. members of sigma alpha epsilon have until midnight tuesday to pack their things and get out, this is after their chapter of shut down. you see the u-hauls there. people packing up to leave. students held protests on campus monday. some of them with tapes over their mouths if you lock

closely with the words "unheard" written across. the school president says there is "zero tolerance for racism and bigotry at oklahoma." listen. >> i think you have to send the strongest possible message, to impact the entire couch this campus but on campuses across the country. and indeed for the rest of us. all of us across america have to start having zero tolerance. we can't sit still when you hear racist jokes or remarks being made even in social settings. we need to stand up and speak out. i think that's why we're having this problem across the country. that's what we're trying to do here. >> an important point there. the national president for sigma alpha epsilon is apologizing for the video and says "this behavior was in no way reflective of who we are as saes and what we stand for. to those that were hurt and offended by these actions, especially the african-american

community and our many african-american brothers i apologize on behalf of our now-closed chapter and its members who will be expelled." a train derailment in the u.s. state of north carolina captured on a camera phone. take a look. >> oh my god! oh my god! oh! >> the amtrak passenger train carrying 220 passengers and crew was traveling from charlotte north carolina to new york when that happened. hit a tractor-trailer which was stuck on the tracks. that caused the fwoifrt cars of the train to derail. 55 passengers were taken to area hospitals with minor injuries. the state highway patrol says no criminal charges will be filed. >> horrible to hear the screams there. you can feel. apple lovers rejoice. the company has released its latest device. we'll tell you everything you node to know about the apple watch. plus this baby girl

survived 14 hours in a car partially under water in freezing temperatures. surely you've heard about this. a doctor tells us how young lily survived. and u.s. republicans sidestep the president yet again. ahead, the open message senators sent to iranian leaders about the nuclear talks. [ male announcer ] eligible for medicare? that's a good thing, but it doesn't cover everything. only about 80% of your part b

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new grand juriet in years. the apple watch. the ceo tim cook, revealed the details at an event in san francisco monday. i'm on the fence about this -- >> a lot of people mixed on this. we take an inside look at apple's new predict. listen. >> reporter: after a sneak preview in the fall, apple finally decided spring was time. >> apple watch is the most personal device we have ever created. >> reporter: the tech giant unveiled the remaining details about the apple watch. the company's much-anticipated foray into the emerging world of wearables. the watch need to be paired with an iphone 5 or later and with ios. the battery will last up to 18 hours. users can make or receive calls, open a garage or hotel room door with certain apps. there's heavy emphasis on health or fit not tracking and a focus on style as much as tech.

>> since what you swear an expression of who you are -- what you wear is an expression of who you are we have made it for people of different tastes and previes ares. >> reporter: $349 for the sport edition and vary depending on size material and band. the highest at 18 karat gold starts at $10,000. the first new device category to be unveiled since the death of steve jobs. while other smart watch have failed to drum up excitement tech watchers feel apple's entry of a necessity. >> something they made to do. this company needs to prove that there's magic out there. especially tim cook who knows more of an operations guy and not an innovate or. >> reporter: preorders begin on april 10th and will be available april 24th. cnn, washington. for more on the apple watch -- we're could debate this all day -- we want to bring in a 30s party, the ceo of the bio

agency. >> joining us live from london. peter, this is not the first smart watch we've seen. we've seen other companies try and release smartwatches. they haven't gained much traction because people haven't found a compelling use for them. why is apple so sure that the watch will be different? >> it is packed full of features that has a potential to change the way we behave. that's why this is you new, first, and disruptive. and apple is good at changing the way we behave from music to personal computing, parkway and smartphones. >> apple has a potential with its size reach, of course this is only going to be operated with an iphone -- >> exactly -- >> with the latest software. do you have pay more for bands and things? won't early adopters -- tech no files need to you prove this is

something we need? otherwise might it go the way of a google glass which of expensive, which was cool but was lame? >> the glass is very expensive. this is priced for mass market audience. in addition think about what it will offer consumer. basic things like phone calls and text messages fine you can k to it from your wrist. the fact you don't need to get your wallet out to pay for things is a great convenience thing. the fact it will help find your direction, location without giving you a map to find your maps, to health tracking, to make us fitter, more holiday and predict potential health issues is interesting. it's wrapped in a price point that's likely to be mass market pricing. >> a lot of people are talking about battery power and it only lasts 18 charges before you have to recharge it. do you think that's a big deal? >> look apple tends to launch

products with fixed power consumption behind it. and products get smaller and the consumption remain the same. in 18 hours for the core applications but don't forget they are saying the watch will last for 72 hours. so i think it will be fine. >> we're becoming so wire will here but i'm capturing my mother occupy how to use the face page. now that we have wireless watches to pay for thing, are there security concerns? apple had issues with apple pay, with its rollout. >> i think it's a natural concern. it's like the first time we do online shopping. we as consumer have to get over the hurdle. when we protect ourselves i think it will be fine in the long run. >> okay peter i gave up using a watch a long time ago. >> really? >> yeah. haven't used a watch for ten years. might make me wear it again.

>> there's a new way to flirt with the watch. you can send a heartbeat to someone or tap their wrist, right? >> sounds correct. >> he's up for it. >> all right. >> thanks. >> thank you very much. appreciate it. if you missed tuesday's big unveiling, you can get everything you need to know about apple watches. so much information, of course on our website, cnnmoney.com. there it is. we are following a harrowing story of survival. find out what officers heard while rescuing this toddler from a crashed car that was in a freezing river. plus republican u.s. lawmakers have a warning for iran and the u.s. president about a potential nuclear deal. "ride away" (by roy orbison begins to play) ♪ i ride the highway... ♪ ♪ i'm going my way... ♪ ♪i leave a story untold... ♪ he just keeps sending more pictures...

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welcome back. ukrainian president poroshenko says pro-russian rebels have pull a significant amount of heavy weapons from the battle feel. >> that's according -- battlefield. >> that's accordance to a cease-fire deal agreed to last month. since then the number of attacks has fallen but accusations of violence continues from both sides. meanwhile, russian president putin is now saying he started planning the annexation of crimea weeks earlier than previously thought. >> the revelation comes amid continuing controversy over the murder of russian opposition figure boris nemtsov. here's our brian todd. >> reporter: five suspects in the assassination of russian opposition leader boris nemtsov

are led into jail with their heads bowed. a sixth suspect never made it into custody. as police closed in, officials say he blew himself up. all the men are chechnyan. one confessed. >> translator: i love the prophet muhammad. >> reporter: a reference to one of the leads by vladimir putin's investigators that islamist extremists could have killed nemtsov because he spoke out against the charlie hebdo attacks. >> confessions in russian law enforcement are usually coerced. confessions are not to be trusted. >> reporter: this journalist left russia because of threats she received. on putin's denial ofnisment in of putin's denial of nemtsov's killing. >> was he going to say i kill her, was he going to say i'm going to step aside and let an independent investigation

explore the possibility that i was actually the murderer or that i gave formal or informal order to have nemtsov killed? >> reporter: despite the fact that nemtsov was of gunned down close to the kremlin, there are conflicting reports on whether the attack was captured on security cameras. the only witness, nemtsov's girlfriend who was with him at the time. she was interviewed by investigators, then fled to ukraine. nemtsov was days from issuing a report exposing russia's involvement in the fighting in ukraine. putin is revealing what he said the moment -- putin is revealing what he said in the moment he decided to annex crimea. he describes a late night meeting with his inner circle in february of last year. >> translator: i said to all colleagues we have to start working on the return of crimea to russia. >> reporter: a few days later, unidentified gunmen took over crimea's parliament from the proxy fighting in ukraine to the nemtsov investigation, analysts are worrying about what an unchecked vladimir putin might do next. >> if he were to decide, for example, to challenge the baltic states, conduct provocations there, the united states would

be forced to stop aggression in the baltic states. that's a clear danger. >> reporter: as u.s. officials watch every move from vladimir putin very closely -- move from vladimir putin very closely, they're pressing for transparency in the nemtsov case. a state department official telling cnn they're hoping for a thorough investigation, not "another whitewash of justice." brian todd, cnn, washington. the white house declaring venezuela a national security threat, and just slapped sanctions on seven officials for human rights abuses. a toddler trapped in freezing water is getting better. her family says lily is laughing and singing as well. >> this is quite an improvement from just a few days ago. she spent 14 hours hanging upside down in a smashed car. her mother was killed in the accident. senior medical correspondent elizabeth cohen explains how lily survived.

>> reporter: late friday night, a man living in this neighborhood outside of salt lake city hears a crash. he looks outside his door and sees nothing. what he doesn't know, a car has skidded off the road and is partially submerged in the spanish fork river. it takes until noontime saturday for it to be started. a official sees the overturned vehicle in the water. >> the witness said there was an arm he could see in the vehicle. >> reporter: the fisherman calls 911. spanish fork police officers respond and wade out to the car. >> felt like i could hear somebody telling me they needed help. it was very surreal. something that i felt like i could hear. >> reporter: they're not sure where the voice came from. when they get to the car, the scene is grim. 25-year-old lynn jennifer groesbeck is dead in the driver's seat. in the back seat, rescuers find her daughter, lily, just 18 months old, in her car seat hanging upside down in a part of

the car not submerged in the water. the toddler is unconscious and unresponsive but alive. the officers flip the car over. >> raised the car up out of the water. as i tried to release the seat belt. >> the child was passed to me, and i just ran up and climbed in the ambulance with the child. >> reporter: for 14 hours, lily survived hanging upside down in freezing temperatures in the upper 20s with no food or water. >> it's amazing, children are very resilient. i think sometimes we don't realize how much they can withstand. >> reporter: as for the temperature, being cold might actually have helped lily. >> when you become hypothermic, it slows the body down. metabolism drops. your oxygen consumption drops. your glucose metabolism in use drops. glucose consumption drops. it ends up being neuroprotective. >> reporter: the main reason lily survived is her mother buckled her in a car seat so she didn't go through a window or drown. something that isn't surprising

to jennifer's sister. >> she loved lily with all her heart. she was the love of her life. >> reporter: primary children's medical center says the toddler is in stable condition and improving. the family shared this today -- "her improvement is astounding. right now she's watching "dora" and singing "wheels on the bus" with grandma. she's smiling and laughing for family. we're blown away by lily's progress and so grateful to her rescuers." cnn reporting. >> they've raised thousands for funeral expenses for the mother and to help raise lily as well. great. >> wonderful. we'll take a short break. when we come back u.s. republicans have a warning for iran on a possible nuclear deal with president obama. up next what the iranians have to say about the challenge to the president's authority. plus we'll get you the latest from day three of the boston marathon bombing trial including never-before-seen video. this here and harrowing details.

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welcome back to those of you in the u.s. and around the world, this is "cnn newsroom." i'm errol barnett. >> just about 3:30 in the morning in atlanta. i'm zain asher. let's check the headlines for you. in argentina, two french olympic medalists are among ten people killed after two helicopters collided midair. they were headed to film a reality tv show. two olympic medalists among the victims. a long distance sailor was also killed. a u.s. ambassador to south korea is out of the hospital.

mark lippert was injured in a knife attack last thursday as he was about to give a speech. he spoke to reporters in seoul just a short time ago saying he feels pretty darn good. police say the suspect was against joint u.s. and south korean military drills. and the university of oklahoma in the u.s. is trying to figure out how exactly to punish the fraternity members you see chanting a racial slur. the school's president said they is severed ties with the sigma alpha epsilon chapter. its members have until midnight tuesday to pack up and go. ou's president said he was outraged when he learned about the video and emphasized that there is zero tolerance for racism and bigotry in oklahoma. >> it's unbelievable to me that in this day and age we could have anyone and especially at our campus where our students overall including african-american students who have been very i think helpful

in this regard and -- i just can't imagine it happening. we're not going to put up with it. that's the message we're trying to send. >> earlier i spoke with an ou student hoping to bring attention to this disturbing video. chelsea davis, the co-director of unheard ou a group of black students advocating for cultural change on campus. listen to when she had to say. you have the president of your university saying that it is unbelievable that this could have possibly occurred with ou students. as an ou student yourself how suppliesed were you when -- surprised were you when you saw the video? >> unfortunately, i wasn't surprised at all. i wasn't surprised at the things beingy is. more so i was -- being said. more so i was disgusted that these were ou students and speaking about me, but my peers and about my friends in these derogatoryy -- using derogatory term. i was disgusted. but unfortunately, i was not

shocked. >> i'm sure a lot of people were disgusted when they saw the video. myself included. is shutting down sae going far enough? do you think the president of the university could be doing more? >> i think shutting down the chapter is not enough. most definitely the university nodes to go above and beyond. every student, party involved male and female everybody on the bus needs to be expelled from the university. it is hate speech i'm pretty sure it breaks plenty of rules within student conduct. this is not enough. i hope that the university punishes them -- [ bleep ] >> i'm not sure if you recognized any of the students on the bus. i know your a student at ou yourself. if you happen to bump into them on campus if you got the opportunity to speak to them what will you sty them? >> i will -- say to them? >> i would use it as a moment of education. i would let them know this the things you said are culturally

insensitive. many people, unfortunately, come from backgrounds where they're not culturally aware of minorities. where they've never seen a person of color. could be a case of ignorance. however, it does not negate the fact that it's unacceptable. >> chelsea davis there. she said as well, that this type of behavior is nothing new, but it's the first time those people have been caught on video. the u.s. ambassador to south korea is out of the hospital after a knife attack last thursday. mark lippert spoke to reporters in seoul a short time ago. our senior international correspondent, ivan watson, of at the conference. joins us live from seoul. ivan what exactly did the ambassador have to say now that he's out and treated? how bad were his injuries? >> reporter: they were serious, and there have been reports that you know a matter of a centimeter or two could have

severed a vein and triggered serious bleeding. fortunately, ambassador lippert was able to emerge from the hospital room about five days after he received the/s to the face and to the arm. we're talking about a four-inch glacier to his face. and he was smiling and said he felt pretty darn good. take a listen. >> i feel pretty darn good all thing considered. it was obviously a scary incident. but i am walking, talking holding my baby hugging my wife so i'm -- i just feel really good. i've got a little rehab left to do on the arm, the face feels really good. thanks to the great medical professionals, i feel like i said pretty darn good. >> reporter: the u.s. ambassador says he wants to get back to work as soon as possible. he appeared to have a transparent bandage on his face over the gash.

he was wearing a bandage on his arm, as well. the attacker was a korean man in his 50s. a south korean man. he had a previous criminal record from 2010 when he attacked a japanese diplomat with a concrete block. he served a suspended two-year sentence for that. the attack has triggered a series of demonstrations and rallies in support of ambassador lippert. south korea a very close ally of the u.s. questioned about security measures ambassador lippert said they would be reviewed. what kind of changes there might be in his security posture here in seoul, it's remarkably relaxed even though we're only 50 kilometers away from the demilitarized zone and north korea. you don't even get searched

going to hospitals, shopping malls, hotels. there are very few metal detectors. he was not asked to respond to north korea which celebrated the attack calling it a knife attack of justice. errol? >> and if anything if the outpouring of support is any indication, it's only strengthened the link and relationship between the u.s. and south korea. many people really not only apologizing to the ambassador but apologizing to the u.s. in general because he is of course a guest in their nation. ivan watson live in seoul. thank you very much. u.s. republican lawmakers are once again operating behind the white house's back over iran's nuclear program. >> that's right. more than 40 senators are public low warning iran's leaders that any agreement not approved from congress won't hold up after the end of mr. obama's second term in office. michelle kaczynski has more. >> reporter: 47 republican senators put their names today

to this open letter to iran informing iran that it may not fully understand our constitutional system. and a warning that the senate must ratify international agreements which in reality isn't the case for a deal like this. they go on to say that any nuclear agreement not voted in by congress will be viewed as "nothing more than an executive agreement between president obama and ayatollah khomeini which the next president could revoke with the stroke of a pen. this president had a pointed response. >> i think it's somewhat ironic to some members of congress wanting to make common cause with the hardliners in iran. an unusual coalition. >> reporter: the surprising move was led by senator tom cotton who today defended it. >> the only thing unprecedented is that an american president negotiated a nuclear deal with the leading sponsor of state terrorism without submitting it

to congress for approval. >> reporter: democrats wasted no time pouncing on this as bizarre, cynical, a desperate ploy to sabotage negotiations. >> juvenile political attacks is a kind of pettiness that diminishes us as a country. >> reporter: senator durbin said the letter weakens america's hand, highlights our political divisions to the world, and had a warning of his own. if these negotiations fail, a military response to iran developing their nuclear capability becomes more likely. these republican snares should think twice about whether their political stunt is worth the threat of another war in the middle east. >> the fact is they're against a deal. if they're so ashamed of the position, why wouldn't they advocate it publicly? >> reporter: the white house would not say whether such a letter harms or threatens delicate negotiations with iran. it will only say it interferes. congress would have some role, ultimately to remove the tough sanctions against iran or not if that were part of the deal. interestingly, the white house

revealed today that that would only happen years down the road from a deal. a number of years, they said, after iran proves itself willing to comply. michelle kaczynski, cnn, the white house. just ahead, putin's admission. the russian president the's candid comments on the -- candid comments on the takeover in crimia. a toddler survived 14 hours -- >> after posting the message, more comment. what is being said about the iranian reaction to the republican letter? >> reporter: good morning from a very snowy tehran this morning. i think many iranians were surprised by the letter, and many found it quite condescending, especially the part that insiniated that many --

insinceiated that many might not be familiar with the system. the response of that the congressmen should understand that the u.s. does not action alone in the world, but there are other countries in the world, as well. in fact these are p5 plus 1 negotiations and not bilateral negotiations between the u.s. and iran. i want to read a passage from what it said in the response. he said the letter is "mostly a propaganda ploy. it is very interesting that while negotiations are still in progress and while no agreement has been reached, some prilolitical pressure groups are so afraid they resort to unprecedented diplomatic history. one of the things he's trying to say is that he believes the senators are undercutting negotiations by the president and they might be trying to undercut an international agreement which is of course something that is valid even

when a government changes. it's a very interesting and pointed respond. one that came very quickly. it's not normal for iranian officials to come out with a response this quickly. this pointedly, and to elaborate so much. you can tell that they were -- i wouldn't say angry but surprised at the letter coming forward. zarif also said he does not believe this will have any influence at all on the negotiations. >> to shift gears slightly. as i speak, iranian-backed militia is working to help iraqi forces take back tikrit from isis. what do you think that will to to sectarian tension in the region? a lot of people saying this could mean the shiaen up exacting revenge on -- shia end up exacting revenge on the sunnis. >> reporter: it could exacerbate tensions in the region. if you look where this is taking place, tikrit and other places in the mostly sunni dominated

part of iraq, there's a lot of apprehension. there's always been a lot of tension between the sides since saddam hussein was ousted from power. the iranians interestingly enough seem to be aware of that. i managed to speak to an expert a couple of days ago. he said they are quite aware of the fact that this is a delicate situation that -- especially if there are reprisal attacks, it could lead to a wider conflict. however, the iranians i have to say, feel they are the ones doing the heavy lifting on the ground. they see it as an important mission. they have top advisers on the ground with the militias they've trained. it doesn't seem as though they appear to be holding back at this point in final. they are well aware that this is a delicate region a delicate operation that they're involved in. certainly they very much understand the sectarian problems that this could cause. >> a lot of people saying that iran is doing a lot more than the u.s. in this battle. could this be the beginning of

iran's long-term expansionist goals, that is the big question. fred pleitgen live in tehran. pressure it. >> a snowy tehran. the white house calling venezuela a national security threat. it's imposing sanctions on seven officials for human rights abuses. >> in response venezuela's president hailed them as heroes and paraded them on national television. reuters reports he appointed one as his new interior blinster. the white house a-- minister. the white house accuses them of violating press freedoms and violent persecution of political dissent. >> national unrest began a year ago when protesters demanded freedom of speech and better security there. in the northern hemisphere, we are slowly inching closer to spring. sure doesn't look like it in some places. find out where the heavy snowfall could break a decades' old world record. prosecutors release

never-before-seen video at the boston marathon bombing. we'll have details on testimony just ahead. ♪ ♪ ♪ ♪ i'm only in my 60's. i've got a nice long life ahead. big plans. so when i found out medicare doesn't pay all my medical expenses, i looked at my options. then i got a medicare supplement insurance plan. [ male announcer ] if you're eligible for medicare, you may know it only covers about 80% of your part b medical expenses. the rest is up to you.

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[ male announcer ] join the millions of people who have already enrolled in the only medicare supplement insurance plans endorsed by aarp an organization serving the needs of people 50 and over for generations. remember, all medicare supplement insurance plans help cover what medicare doesn't pay. and could save you in out-of-pocket medical costs. call now to request your free decision guide. and learn more about the kinds of plans that will be here for you now -- and down the road. i have a lifetime of experience. so i know how important that is. the third day of the boston marathon trial included harrowing testimony from the 2013 attack and video that had never been released to the public. >> dzhokhar tsarnaev ended up

wounding more than 240 and killing three with his brother. >> reporter: the tsarnaev brothers rounded the corner together to the marathon route. tom land in the need -- -- tom tamerlin in the lead. later, dzhokhar tsarnaev standing by himself for four minutes. among speck tears several children. at 2:49 records show using a disposable phone bought the he calls his brother. later the first bomb explodes. he moves in the opposite direction reaching the corner as the second bomb detonates. neither of the brothers have their backpacks. less than 23 minutes after the terror attack, dzhokhar tsarnaev enters a nearby whole foods and pays cash be for a half gallon of milk.

he leaves only to return moments later to swap the milk before getting back to the passenger side of a car. the driver speeds off. that night on one of two twitter accounts under his name tsarnaev posts "ain't no love in the heart of the city. stay safe people." prosecutors say 19-year-old tsarnaev had returned to his dorm room at umass dartmouth. he's seen here at 9:05 p.m. the next night, entering the fitness center with a friend and staying for about an hour. the fbi gathered 4,000 hours of surveillance videos, photos and home movies from that day. witness jessica kenski. the realm unanimous of her legs sticking out from her dress. the scars on her stumps visible, was wheeled up a ramp to testify. kenski a newlywed and trauma nurse, described the bomb saying it did exactly what it was designed to do -- tear the skin and muscles away leaving body parts exposed.

she instinctively reached to help her husband when she you saw his detached leg and dangling foot not realizing she herself of on fire. prosecutors showed the burned camisole and yellow hoodie he was wearing at the time. she said it matches all my burn scars. prosecutors also introduced a second twitter account which they say belongs to dzhokhar tsarnaev. the post regulars much more radicalized and -- postings are much more radicalized and talk about victory over the nonbeliever. tsarnaev's lawyers are expected to raise questions over those postings during their cross-examination. deborah feyerick cnn, boston.

this winter a lot of cities across the u.s. have seen snowfall but none quite like this. it appears a world record may have been broken. >> yeah. >> right? >> yeah. >> passage pedram javaheri here to tell us about it all. >> the them this winter has been snowfall and record snowfall. no one has come close to this for just one day. and this happened in the last couple of days in italy. the world meteorological organization is sending their staff to verify the exact amounts in several locations, but it look like eight feet came down in one night. >> i love pictures of this. i love looking at that -- >> a dump down of snow. >> absolutely. the mountain of italy. >> eight feet. 1,000 people live here across portions of italy. let me show the images eight feet of snow in 18 hours coming

down here. impressive site. can you imagine coming down where a thousand people call this town home then you get outside and impassable conditions. snowplows working overtime the last couple of days. we'll show the location the town about 140 kilometers or 90 miles east of rome across the mountains of italy. they're notorious for heavy snowfall. they've seen this before but nothing quite this much in a matter of a few hours in italy. here's what happened and what transpired. new 24-hour record of snowfall 101 inches in 18 hours. previous record in the 1920s out of silver lake in colorado. 76 inches came down in one day. we toucheded on boston so much the seasonal snowfall this winter, almost 10 inches. all of january and all of february combined boston saw less snow than what they saw in italy in the last couple of days. zeroing in on the side of the screen that is the world's

tallest living man of turkey. he is 98.8 inches tall 8'3". the snow would be higher than his head. >> burying him completely. buried in snow. >> yes. if you melt that it's ten inches of liquid water piled up. >> yikes. >> what is going on? thank you very much. >> yeah. a plane attempting the first solar-powered flight around the world is now on its second leg of that journey. two swiss pilots took off in solar impulse 2 in oman tuesday morning. the nekd stop -- the next stop is innia. they completed the first part of the flight monday after flying 400 kilometer was abu dhabi. >> here's what the pilot had to say about the journey. >> the plane has incredible performance because of course --

it goes forever without any fuel. without the need left-hand for-- the need to land for refueling. i'm just loading batteries in the air with the sun, with a bigger amount than what i need to fly. the more i fly, the more energy i have. and this is an absolutely fabulous feeling. >> that is fantastic. i should let our viewers know that we're watching via web cam you as you pilot the plane. feel free to wave if it's safe enough. we have a shot of the control room in monaco. your team of people trying to make this successful. talk about your exact location and how you're going to navigate unpredictable winds. your initial flight was delayed you because of unpredictable winds. the aircraft itself is quite light. >> the aircraft is very light. we need of course very good

forecast and tracking the trajectories on computer. right now i am in the middle of the arabian sea. between oman and india. it's a flight of about 1-500 kilometers. what is fantastic is that it will be the first time ever that there is a solar airplane flying in asia. >> the five-month trip should allow them to hit china, the u.s. and europe. >> incredible. thank you very much for watching, i'm zain asher. pressure you being with us for this -- appreciate you being with us for this hour. >> i'm errol barnett. "early start" is next. have a great day. i've just arrived in atlanta and i can't wait to start telling people how switching to geico could save them hundreds of dollars

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. oklahoma outrage growing disgust over a video shows students with a racist chant. the fraternity closing its doors. we have reaction. senate republicans warning iranians that the final say in the nuclear deal rests with congress. but this not sitting well with the president. we have strong reaction. and isis on the ropes in the key city of tikrit. iraqis taking ground. the top general expects to defeat isis. a