s them to meet the basic needs of their lives with dignity. >> thank you for your patience. >> thank you. >> they fixed everything. >> it is a lot of weight off my shoulders. >> it is about moving people forward and their lives forward. if you know somebody who deserves recognition, tell us about them and nominate them at cnnheroes.com. -- captions by vitac -- www.vitac.com good evening. thanks for joining us. tonight breaking news on a lot of fronts. first the airmen and isis. what a grand jury says a former u.s. air force mechanic did to help the terror group. also tonight after dodging questions about is had big spending ways allegedly on the taxpayers' dime, congressman aaron schock's downton the

abby's existence. how robert durst managed to dismember a man, dump the body and get rid of the pieces. elections from israeli. prime minister mention min netanyahu is locked in the tightest fight of his american life. a american military veteran will be arraigned tomorrow in new york on federal charges that could send him to prison for decades to come. for more now on what authorities believe he was up to and how exactly they caught him, we're joined by justice correspondent pamela brown. so what do we know about this guy? >> anderson law enforcement officials that i have been speaking with say that he was not go g toing to turkey to be on vacation. they believe he was going to syria to link up with devices. authorities allege that he tampered with his electronic devices including his laptop. the fbi was still able to recover some of what was on his computer, including more than 100 terrorist propaganda videos, including isis executions. the fbi says it found web searches for ways to cross from turkey into syria. there were also communications

with his egyptian wife and a letter where he allegedly wrote, "i will use my talents and skills given to me to establish and defend the islamic state. there are two possible outcomes for me -- victory or martyr." his attorney says his client will plead not guilty in court in new york tomorrow. >> i understand he left the air force in 1990, but shortly came on the radar of the fbi in 1990, and why is that? >> according to this criminal complaint he converted to islam in 1998 and became increasingly radical. he worked for american airlines after the air force. apparently the fbi was tipped off about him in 2001 because a co-worker was saying that he was sympathizing with osama bin laden, that he also had expressed interest in traveling to chechnya to fight jihad. then after that questioned by the fbi. he was still able to go on and work for private aviation companies as a mechanic in the u.s. and in the middle east where he lived for a year-and-a-half before turkish

officials turned him away at the airport as he tried to link up with isis, allegedly. >> wait a minute. he'd already been flagged by the fbi and had expressed a number of views against the u.s. yet he was hired as an army contractor in iraq? >> that's right. i've been asking a lot of officials about this today. here's what we're learning. basically if you become a contractor for the army you have to go through a security clearance and you have to go through a background investigation. but the system is not enough to flag cases like this where you don't have ongoing investigations. clearly, the fbi at the time didn't have enough evidence on pew to actually bring charges against him so it wouldn't be surprising in light of that that he would have passed that background check because there wasn't an ongoing investigation at the time the check happened. i was speaking to a former air force colonel that he is clearly

someone who could have done a lot of damage. he says it is possible he had access to service members and airplanes despite the fact he passed his background check. >> pamela brown, thank you. no word on just how much legal difficulty outgoing illinois congressman aaron schock may be facing. he resigned today after one too many questions about his big spending and dubious accounting including from our own drew griffin. >> can you explain the lavish lifestyle you've been leading on the backs of taxpayers? >> i would say this, as i've said before. i take the law and my compliance very seriously. >> congressman, do you think it is appropriate to spend political donations in kind of a slush fund? $24,000 in private plane tickets? do you have any explanation, whether legal or not, is it right, is the question. looking back, do you think you made a mistake? can you understand why people are concerned why you sold your

house and overvalued property to a political donor and do you know why mr. beaje bought that property at such an overpriced value? >> i hope you enjoy your time this the 18th district. >> just one? i have been polite to you. >> congressman schock just a couple of days ago neither answering drew's questions or to the people who elected him. joining us now, chief legal correspondent dana bash working with her sources on this story. i guess not exactly a surprise given all of the heat he was under. but a lot of questions still

remain to be answered. >> you talk about heat, six straight weeks of unrelenting stories about questionable spending, as you just heard from drew, both taxpayer dollars and political donations. this morning he told those close to him he would end his once promising congressional career. >> reporter: sources close to aaron schock tell cnn it was a pair of new revelations that cemented his decision to resign. a report that he may have benefited from a political donor in a real estate deal, another that he was reimbursed by taxpayers for tens of thousands of miles he never drove. by resigning from congress schock could still face legal troubles. he's trying to clean up his financial mess. sources close to cnn saying he's reimbursed all monies received for official mileage since election to congress. >> i stand here mass a state representative and a nominee for congress at the age of 27. >> reporter: it has been a dramatic fall for the 33-year-old once-rising star in the gop, starting six weeks ago when the washington reported he decorated his congressional office to look like the set of "downton abbey." to the tune of $40,000.

$15,000 was initially billed to taxpayers, but then returned. he had hoped to shake scandal off. >> as taylor swift said, hater's gonna hate. >> reporter: but his bright red "downton abbey" decor sparked a massive spark of criticism and instagram pictures which left a trail of questions of how he financed his jet-setting lifestyle, tangoing on the streets of buenos aires, surfing shirtless, hobnobbing with celebrities. taking his staff to a katy perry concert. a $10,000 junket for his staff to new york city.

>> i take my compliance obligation seriously. >> reporter: in the end his decision to resign happened so fast, house gop leaders and even constituents in town to see him were, well, shocked. >> i am very surprised that it happened. i'm sad that it happened. especially the way that it did. i honestly didn't think two cause him to resign but it is still sending a bad message to the constituents. >> when does his resignation take effect? >> march 31st. that's two weeks from today. what happens is there's going to be a special election to fill his seat, likely some time this spring or early summer. we're already told that darren lahood, the son of long-time congressman from that district, ray lahood, will announce as soon as tomorrow is that he'll run. this is a historically republican district and so it should stay in the gop hands, but you never know. >> and now bringing in jake sherman who's reporting might have been the last straw. politico was reporting you report and ask something questions of schock 12 hours

before he resigned. explain what your reporting showed about the mileage reimbursement he got on his personal car. because it is pretty damning stuff. >> we've been reporting for about six weeks about many things but specifically the mileage reimbursements. he had a high rate of getting reimbursed from the government and from his campaign accounts for miles he drove. we submitted a freedom of information act request with the state of illinois for all vehicle records and we found when he sold the car that he was driving between 2010 and 2014, it only had 80,000 mile ss on it. he claimed that he had driven about 170,000 miles on it. even if he drove it for exclusively campaign use it would be far less than he submitted. answer i got was not any explanation initially about the reimbursements but the message that he would be resigning effective march 31st. >> since then, have there been any explanations?

if he billed the taxpayers for 17 170,000 miles, and the car had 80,000 miles on it, that would be fraud. >> it would appear to be a form of fraud. >> he hasn't explained why he did it, why discrepancy is so large. there are questions that need to be answered. the federal law enforcement agencies might have to be asking those questions. he he's no longer covered by ethics committees. the congressional watch dogs that would typically pursue something like this are no longer operative because schock is out of congress. still no answers but a lot of questions outstanding. >> i don't understand why the ethics stuff stops. >> you've seen historically when members of congress are in really big trouble, they tend to just leave because it does stop the ethics investigation. if he would have stayed, no question the things that we know

about and from what i'm told things that perhaps could have been about to come out would have been the subject of a big investigation. his office had already been contacted by the ethics committee. likely he was as well. so that's why this is over. but as jake is hearing, as i am hearing and i think as is blatantly obvious by what we've been reporting, his problems could be far greater than just the ethics committee and maybe with the federal law. >> jake, it is interesting because he didn't exactly hide his kind of lavish lifestyle. multiple flights on private jets. trips abroad. it was all documented on his instagram. i guess he had this personal photographer he traveled with him. >> he lived a very strange life on the taxpayer and campaign accounts. you don't really see too many members staying consistently at the four seasons, the ritz-carlton, the peninsula hotel, flying in private jets.

i've talked to members of congress who have far larger congressional districts who don't ever take private jets. to say this was lavish is perhaps an understatement. you're right, he documented this entire thing on instagram which is perhaps a commentary on being 33 in congress can and with being a young guy, and wanting to be a young guy and using instagram. but this lavish lifestyle extended way beyond the office. and extended into the political life. >> he has a lot of questions to answer. quick reminder, set your dvrs. watch "360" whenever you would like. the inside story of a very tense mid-air moment. you will see and hear what it was like to be aboard united 1074 as a man charged the cockpit yelling and other

passengers jumped into action to take him down. >> he was saying like they're going to bring the down down. plane's going to go down. breaking news out of israel where elections could mean the u.s. and the region. because we're in the how-do-i-get-this-startup- off-the-ground business. the taking-your-business- global-business. we're in the problem-solving business. 400,000 people - ready to help you solve problems while they're still called opportunities. from figuring it out to getting it done we're here to help.

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frightening moments on a united airlines flight from washington dulles airport to denver, colorado last night. a passenger put a key lesson from 9/11 into action -- never, ever let a passenger storm the cockpit. fortunately it never came to that. it was not a terrorist attempt. it was simply a terrifying incident. a passenger joins us to share what he saw. we have this report from gary tuchman.

>> reporter: an image like this exists because airline passengers took matters in their own hands. and ended a potentially dangerous situation. the unidentified man now in custody. united airlines flight 1074 with 33 passengers, six crew members had just taken off from dulles airport outside washington on its way to denver. less than 30 minutes after takeoff though this is what the pilots told the tower. >> declaring an emergency due to a passenger disturbance. >> reporter: disturbance was man running up the single aisle of the 737 shouting jihad, jihad. according to some aboard the plane. another passenger said the man was shouting the plane was going to go down. >> he ran forward towards the cockpit and he is being restrained by other passengers. >> reporter: those other passengers and at least one male flight attendant weren't about

to take any chances making sure the man was done with whatever rampage he was planning. he had bruises on his face apparently from being taken down. >> i'm sorry! i'm so sorry! >> it's okay. we're going to get you off this plane, buddy. >> reporter: captain and first officer let the tower know this -- >> the cockpit is secure and we would just like to return to the airport and have the authorities meet him. >> reporter: the cockpit door was never breached keeping the door locked as the rule in this post-9/11 era. in reality the perpetrator in fact never had a chance to get in that door. >> this day and age passengers feel empowered, and they should, to keep themselves and their aircraft safe and they are protected from suit by the person they have to subsue because the u.s. law says if passenger do that, they are immune from pursuit and prosecution. >> reporter: passengers held the man down until the plane landed. >> relax and don't move. >> reporter: he's now in the hospital for observation. no weapons found and no charges filed as of yet. gary tuchman, cnn, atlanta. >> what you just saw unfolded right in front of passenger

joshua linstrom who was sitting with his wife in row 3. i spoke to him a short time ago. can you just take us through what happened, because i understand that you were on row three and you felt a hand from this man as he was running up the aisle toward ss the cockpit. what happened? >> he was leaning forward as the plane was going up. he was looking out the left-hand side. he was really occupied with the left-hand side. his head was bobbing up and down almost as if he expected to head to pop up outside the window. you know what i mean? because he was looking you a around saying they. he was talking. and almost -- it happens so fast, i remember grabbing my wife's hand and i said this isn't good. i went to unbuckle, at the same time i noticed the guy across the aisle in 3e was unbuckling. the attendant gave some sort of command to stand back and he turned and started heading towards the cockpit. and the guy in 3e was a

lightning bolt and just jumped out of his seat and took the guy down to the ground. >> others actually joined in as well then, right? >> yeah. his seat mate came in behind and so the first guy was the guy who was on top. the second guy had sort of the feet. the guy i think from 1a kind of jumped around on the head. a guy, flight attendant, got in the mix and the four of them wrestled and held him down on the ground. >> what was this guy saying? some reports are saying he said the word jihad. you did not hear him say that. what did you hear him say? what did others hear him say? >> he was saying like -- they're going to bring the plane down. the plane's going to go down. then he would switch to being despondent, i'm sorry, he had

some story like making money in money. he was like, come with me, come with me. he with a push him against and the guy holding him would say just lie still, we'll get you down on the ground. he would fight and sort of go through this wave of emotion up and down for the entire length of time. >> all in all as you look back on it, did it feel to you this was just somebody who was mentally unstable or unstable in some way, not an attempted terror attack? >> it deaffinitely from my vantage looking at it, it was more troubled than terror. you know? but i wasn't the guys holding him down. >> i know. one of the guys holding him down said that he did say the word jihad. >> no, i never heard him say jihad. it could have just been i was preoccupied with him saying the plane's going down, they're going to bring the plane down. when the police escorted him off

the plane and the passenger came back and sat down, we started to chat, he said did you hear it? like he said jihad a couple times? i don't doubt that he said it but he wasn't running down the aisle at first saying jihad. it certainly -- it was more troubled than terror. >> i can't even imagine. passenger joshua linstrm, thank you. with more breaking news. we are getting this in. the secret service is confirming preliminary screening that a letter sent to the white house reveals possible signs of cyanide. more testing is being done. more happening tonight. a late update on israel's election. prime minister netanyahu speaking just a short time ago. we'll bring you that next. we use natural gas throughout the airport - for heating the entire terminal generating electricity on-site and fueling hundreds of vehicles.

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just before the break we got word from the secret service about a suspicious envelope and a possible early test result for cyanide. jim acosta is on the phone and tells us about what he knows. what have you learned, jim? >> well anderson on monday i

guess which was yesterday, an envelope was received at the white house, there was a mail screening facility which was something that's been set up just for these types of situations. this was many, many years ago, but it is to screen mail coming into the white house for just these sorts of situations. accords to the u.s. secret service they did an initial biological testing on the nfl. envelope. but earlier today they did testing on this envelope and returned what they're calling a presumptive positive for cyanide. then that sample was transported to another facility to confirm the results. and at this point the secret service is saying this is an ongoing investigation. they don't have any additional comment at this time. but we have heard from a law enforcement official in the last half our there were no injuries or exposure concerns for the person at the sorting facility who opened this letter. again, with all the questions that are going on with the secret service, this is an example of when they do catch something and they do perform their duty and something is found in time to prevent something quite damaging from reaching the white house.

>> any idea how long it is going to get more testing? >> these things typically can happen in a couple of days. we should know in the next 24 to 48 hours. for right now the secret service is not commenting but they were relieved to catch this when they did at the mail sorting facility which is again, why it is there. it is interesting that it was not initially testing positive, but it tested positive later today, so we will have to wait to see what the late zest on that later this the coming days. >> and nobody at the facileity tested positive as well. perhaps the most consequential israeli election in decades, crowds gathered outside benjamin netanyahu's campaign headquarters. he ignited controversy in washington renouncing his two-state solution and

denouncing a compromise with iran. he's tonight claiming victory. >> translator: against all odds we achieve this huge victory for likud. >> exit polling doesn't yet bare him out. zionist union's candidate says he is still in the race for a new government. going in his coalition had been expected to outpoll likud in israel's parliament. a lot at stake for israel, the region, the united states. we will talk about it with senior political contributor david gergen and obviously, the obama administration is saying that whoever gets into the

office, whatever the ruling party is, the good relationship between the united states and israel will continue. the support is unwavering. clearly though for this white house, a strong showing by netanyahu, is it clear it is not what they wanted? >> behind the scenes we all know that the white house really, starting with the president, loathe benjamin netanyahu and they have been privately hoping that isaac herzog would be able to put together a government and restores relations with the united states. there are a lot of wild cards in the years ahead. if the israeli government will not have a government for it appears maybe several days -- could be weeks. in that situation, how does israel -- how does netanyahu in particular now play a role in the closing days of the iranian negotiations? he'll speak with muffled voice. he'll no longer represent the state of israel until this election is resolved. >> it's also because not only is netanyahu being criticized for

saying that he doesn't want a two hf two-state solution under his leadership, and some people say it confirms their suspicions all along, and his position from years ago, but also their position that is critical of him that is warning of a high turnout of arabs in israel to vote, and which they are saying that is the position of the former leader peter? >> yes, and it is very, very ugly of the last few day, and disspiriting that they were helping him. he is saying that the arabs are voting in drove, and those are israeli citizens that he is supposed to be representing. imagine what the reaction would be if an american said you better get to the polls because all those black people are going to vote. it is essentially what he said. it is a desperate effort and it

is really disturbing. if israel goes down the road of electing netanyahu and a right wing government been it will probably mean a more isolated israel and an end to the peace process. >> do you agree, david? officially, the united states backs a two-state solution. >> i don't see how benjamin netanyahu as a prime minister there is going to be a realistic hope for a peace process on his watch. he said he's now against a two-state solution. i don't know where you go from there in terms of getting a peace process going. one of the interesting questions i think hanging in there, one of the interesting sort of wild cards is the arab vote. they now have the third-largest bloc. they said they would stay out of forming a coalition. but do you feel, peter, there is a possibility they could now join up with likud, with herzog and form a government? >> well, this has been one of the problematic issues of the israeli politics. by tradition arab parties have never been part of a forming an israeli government coalition. there's been a historic

understanding in israeli politics, you always needed a jewish majority. so you're right, the arab parties have said they don't want to become part of it but herzog has also suggested that himself doesn't want to bring them in. i think it would actually be a very positive development for israel if israel were to include arab parties in is governing coalitions but that's not been the history. >> a lot to learn in the next couple of days and hours. ahead, police raid robert durst's home as he's charged with first degree murder of a friend in 2000. the latest on that and plus the acquittal 12 years after he ed a admitted to dismembering h his friend in galveston bay. we'll speak with two jurors from win of his trials next. but mindy was actually not invisible.

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well, breaking news tonight. police are searching the houston home of robert durst who is in custody in new orleans. looks like he'll be staying in new orleans a little while longer. he was in court today related to his arrest over the weekend. another hearing is set for

monday. he faces extradition to california where he is charged with first degree murder in the death of his long-time confidant susan berman 15 years ago. he was arrested saturday a day before the season finale of "the jinx" aired. today his attorney said the california warrant was issued because of a television show and not because of the facts. the series investigated the disappearance of durst's wife, berman's death and his acquittal in texas where he admitted killing and dismembering his neighbor. in a moment i'll speak with two jurors from the case. but first -- >> reporter: his name is morris black. you might say he had the rotten luck of being robert durtsz's neighbor. robert durst is accused of killing him and dismembering his body. soon the man's arms, legs and

torso began washing ashore. in galveston a 13-year-old boy discovered them. >> i didn't know it was a body until i got really close to it. >> reporter: it all happened in galveston, texas where durst fled to from new york after his wife disappeared. she was never found. neither was a key piece of evidence in the death of morris black. his head. without it, investigators couldn't examine the bullet wound for themselves. >> don't cut somebody up, another human being, into pieces, and bag him up, dump him in the bay, when you act in self-defense. >> reporter: prosecutors believe durst really killed black so he could assume his identity and hide from detectives investigating his wife's disappearance. durst was already using a fake identity though. cross dressing as a mute woman often walking around smoking marijuana. durst, meanwhile, never denied killing black. >> i figured it was deep. going to drop it, it is going to sink. who cares where the tide is going. it's underwater, nobody's going to see it. >> but the bags didn't sink. >> no. >> reporter: durst also admitted to police black died from a

bullet in his apartment. he confessed to dismembering the body and cleaning up all of the blood and wiping out any trace that morris black ever existed. >> he says he was looking on it as if it were a dream, as if it was someone else. i was watching it happen. it was like a sea of blood, like looking through a bloody glass. >> reporter: they say durst tried to break off the friendship telling black never to come to his apartment again. they struggled over a gun. durst panicked after killing black so he got lis of his body. police recovered a 9 millimeter handgun and a bow saw from his car. in the trash, a 22 caliber handgun. inside of his apartment, a pair of bloody boots and a knife. still in the end, the jury

believed it was self-defense. >> we the jury find the defendant robert durst, not guilty. >> reporter: robert durst walked free avoid inging what could have been up to 99 years in prison. randyi kaye, cnn. >> joining me, two jurors that acquitted durst in that murder trial. before we get to the galveston case you're featured in the hbo documentary about robert durst. i wonder what went through your mind when you heard that he had been arrested this past weekend? >> i was very surprised. shocked. i had been interviewed for documentary a few years ago and had been watching it every episode, every sunday. >> deborah, i'm wondering how you respond to criticism, which i'm sure you got after the trial was over and still today, people

basically saying how could this guy who admitted to killing, then dismembering a person, morris black, how could he be acquitted? i'm wondering just as a juror how do you see it? how do you explain it? >> well, anderson, like i said, in the first trial, it wasn't a 9-3 vote that he was not guilty. it was a unanimous vote by everyone on the jury. and i did what the system required of me to do and by the verdict coming out to not guilty, it just was what it was. i mean i've got a lot of flack for it. >> i mean again, you're doing a service by sitting on the jury so, anybody who's giving you flack, they weren't sitting in you're seat. joann, as a jury, did you take into account he had dismembered morris black?

could you take that into account? >> no. that's one thing -- i'm glad you asked me that. deborah, i'm sure, will agree with there. that was not part of this trial. the trial that we sat as jurors on was how morris black died. so the question was, the actual charge that we had to answer was, was he murdered or was he killed in self-defense, or by accident. and the state could not prove it. >> jeff toobin, it's interesting because, had this been a head -- his head was really only body part that was still missing -- had there been a head, perhaps the authorities would have been -- the state would have been able to prove how he was shot which would have differed from robert durst's account of the actual shooting. but without a head, it was basically robert durst's account of how he was killed. right? >> that's right. and who removed the head but robert durst. so i respect these jurors. i respect anyone who does jury service.

it's a difficult job, but it does not mean that they should be immune from criticism, but i do believe that the jury made a mistake the and if i could point to one specific point. the jurors have consistently said that the cutting up of the body had nothing to do with the case but that is not true, because the prosecution pointed to the cutting up of the body of durs's -- durst's consciousness of doing something wrong, and that is something that the jur are ri jury's mistake of not seeing that. >> jo ann, to you, in your mind was there any question though, even though he wasn't charges for chopping up the body that

that told you what kind of a person he was, that told you about what he thought about what he had done? >> the instructions that we had and the remarks in the trial were that he wasn't on trial for these things. i mean he admitted that he did them. i mean we were told that he was -- you know, one reason that he cut up the body was because no one would believe what happened and so he was running away from jeannine pirro. when we hear that as evidence in trial, we think that's the truth. >> how good are the lawyers in los angeles? in the documentary, they seem really, really good to me. >> you asked are they good? i call them brilliant. brilliant attorneys sitting over there fighting for him. whether the d.a. only had two people sitting over there fighting for this case. we were told we couldn't hold these things against this man. he was on trial for a murder and that's the way it was. and i would like to say to you that for 11 years i've been -- hasn't a month gone by that i

haven't been reminded of robert durst, not a day. in fact, to the point where they called it "my boy." that's "my boy." >> you must love that. >> i just did what i had to do. >> no. i don't love that. >> i'm kidding. i'm kidding. >> i'm not his next of kin. i'm not his next of kin. >> i think you're counting your lucky stars you're not every single day on that one. i would certainly be. jo ann and deborah, appreciate your time. jeff toobin as well. coming up next, a tough call. promising nfl rookie with potential to make millions quits the nfl. he says it is not worth of risk to his head and long-term health. dr. sanjay gupta has reported on professional football and head injuries. he joins us next.

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tonight a decision that could not have been easy to make. an nfl rookie linebacker says he is leaving the game for the sake of his health. he's 24 years old and many consider him a superstar but he's walking away because he

he's walking away because he says he's worried about the long-term effects of concussions. >> it is a unique decision to me. i've done a lot of research. what i had experienced in my past. projected to what i would have to do to be the linebacker i wanted to be. and for me it wasn't worth the risk. i'm certainly not going to take on health risk or compromise my well x just for money. >> studies have linked repetitive head trauma, concussions with long-term brain damage. dozens of nfl players have been diagnosed with progressive brain damage after their deaths. dr. sanjay gupta has done a lot of reporting on this issue and joins me tonight. to retire from the nfl at 24 is pretty unheard of. but long term, the risks they expose themselves to are serious. >> the documents from the nfl

say they expect one-third of their repird players developing a cognitive problem. they say they guessed high because they tried to account for as many players as possible to take care of them from a medical standpoint. but one-third of players is pretty significant. average player a player dies from the nfl is 57. three times more likely to developed things like alzheimer's als and other cognitive problems. there's correlation that we've seen for a long time. he is the first player though to basically say, because of my concern, specifically brain injuries, cte, i'm making this decision. this may surprise you a little bit. he is a linebacker. you think those guys on the line are going to have the biggest blows to the head. oftentimes they do. but it is really more the speed players. quarterbacks, for example. running backs. players who are moving at a high rate of speed, then have collisions. or if you are a quarterback, somebody is coming at you at a high rate of speed. those injuries seem to be the most significant. it is not just the impact itself. but also what we call rotational impact. look at the way the brain moves in that animation there. it is not just a blow, but the brain is actually moving in a rotational force as well. that seems to be really more highly associated with concussions and subsequently cte. this animation shows the brain doesn't just take a blow, it changes its shape. it contorts. it moves in response to a blow, and that causes some of the damage even at the neuron level. >> a lot of players will stay from. they need the money, they love the game, whatever the reason, they've worked really hard to get there obviously. is there anything they can do to mitigate the risk? >> there's been a lot of talk of can you make football be a safer game and still be football. i think there's been some various things that have lapped at the league level to try and reduce the impact of these injuries. for example, the kickoff return is one of the fastest moving parts of the game. player gets the ball, they're

running back, as fast as they can, they've moved the kickoff line forward so you have fewer of these instances where people are returning the ball at a high speed. you also find it is not just big blows that cause the problem but many different blows to the head that can, over time, add up. a lot of those are lapping in practices. but it is a rough and tumble game. there's no question. >> incredible. sanjay, thanks very much. and make intercourse more comfortable. premarin vaginal cream treats vaginal changes due to menopause and moderate-to-severe painful intercourse caused by these changes. don't use it if you've had unusual bleeding breast or uterine cancer blood clots, liver problems, stroke or heart attack, are allergic to any of its ingredients or think you're pregnant. side effects may include headache pelvic pain, breast pain vaginal bleeding and vaginitis. estrogens may increase your chances of getting cancer of the uterus, strokes, blood clots or dementia so use it for the shortest time based on goals and risks. estrogen should not be used to prevent heart disease heart attack, stroke or dementia. ask your doctor about premarin vaginal cream. alright, so this tylenol arthritis lasts 8 hours but aleve can last 12 hours. and aleve is proven to work better on pain than tylenol arthritis.

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we're learning a lot more about the suspicious letter sent to the white house. new details next. we're following developments in the suspicious letter sent to the white house. the envelope held some kind of milky substance held in a

container in a plastic bag. preliminary testing tests positive for cyanide. more testing is under way. on st. patrick's day in 1913 priceless works of art disappear ed disappeared in boston. we will look at how they the did it and how the works of art have eluded police for decades. we will look at who pulled off the greatest art heist in history. here is a quick preview. >> i'd like to say it is boston's last best secret. >> reporter: who stole the 13 works of art from the isabella stuart gardner museum and where are they now? it is a question that continues to puzzle me museum security director anthony amore. >> there were lots of quirky things about it. every time you turn around there is a different interesting fact

that you find. >> reporter: one of the biggest questions for him -- why did thieves steal what they did? remember path of the thieves on the second floor when they went from the dutch room to the short gallery, bypassing valuable works of art that were small and portable and worth a lot more than some of the other art they stole. >> the two big rembrandts and the vamir, those three pieces account for 90% of let's call it $500 million, $400 million of the value. >> reporter: another big question -- why did the thieves bother taking the golden finial that sat atop a napoleonic flag. >> they wanted very badly to get that flag. that always seemed to me the clue that's most interesting. >> a fascinating hour, fascinating mystery.

it starts right now, and here is the cnn special report "the $500 million question who pull d aufed off the greatest art heist?" inside these walls, priceless works of art. but also a mystery that has lasted for 25 years. >> i would like to say it is boston's last best secret. >> on march 18th 1990 $500 million worth of art stolen from a boston museum. the biggest art heist in history. >> this is the creme de la creme of art recovery. >> how did the thieves get inside and get away with 13 priceless pieces? and where are the paintings? >> once they leave, they were never heard from again. >> in his only television interview, hear from the security guard who let the