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next time. disrupt trump rallies. >> donald trump is a pathologic liar. >> reporter: both candidates have grown increasingly caustic in their criticism of trump. in fact tonight, scott, in illinois, clinton accused him of inciting the kind of mob violence she said used to lead to lynchings. >> nancy cordes, thanks. the "cbs overnight news" will pea right back. -- the "cbs overnight news" will be right back. [ vocalizing ] [ buzzing ] [ tree crashes ] [ wind howling ]

now we will turn for insight to anthony salvato cbs director of elections expert on delegate math and all of the rules of the primaries and caucuses.

tomorrow, if donald trump wins florida and ohio, will his nomination be inevitable. >> he will be all but certain. he won't clinch but a commanding lead in delegates and commanding position to get the rest that he needs. first because the rules now start to change the way that states give out delegates with more winner take all contests, tends to favor the leader and make it harder for trailing candidates look cruz and kasich to catch up. but more than that, trump will also be heading into a map beyond tuesday that should favor him politically. there will be contests in the northeast in the west. places that are full of the kind of blue-collar, suburban republicans voteding for him already. so the thinking will go if they can't find a way to stop him tomorrow, in places like florida, ohio, hard to see huh they suddenly find a way to stop him at all. >> what happens tomorrow if trump wins florida, as seems likely now, but loses ohio? which is possible. >> it will become much harder for him to win the nomination

that's what his opponents, cruz and kasich are hoping for. slow him down if not to catch him. a glimmer of hop to those who want to see this process go on. into the spring, maybe into the summer, and to the convention. >> anthony salvanto, cbs news director of elections. thank you. severe storms including a tornado swept through western ohio today. cell phone video captured the twister on the ground. north west of dayton. there were no injuries reported. a number of buildings were damaged. floodwaters are rising in the deep south after days of relentless rain. the pearl river on the louisiana/mississippi border expected to crest tomorrow. at the same height as a devastating flood in 19 # 3. as much as 2 feet of rain fell across the region. six people have died. more than 6,000 buildings in louisiana have been damaged. two people are in critical condition tonight.

an amtrak train flew off the rails overnight near dodge city, kansas. the southwest chief was headed from los angeles to chicago, when the engineer noticed a twisted rail ahead. he hit the emergency brake, but it was too late. investigators are checking to see if an earlier vehicle accident bent that rail. in a surprise move today, russian president vladamir putin syria. and said he is ordering the withdrawal of most russian forces. since september, russian war planes have pounded opponents of syria's assad dictatorship turning the tide of the 5-year-old civil war. with russian air cover, assad's forces have captured considerable territory from the rebels. a partial cease-fire has reduced, but not eliminated the fighting. the cease-fire does not apply to isis, which still controls about

including the city of mosul with nearly 2 million residents which has been cut off from the world since isis took over in 2014. well, tonight. holly williams has rare insight into what is happening there. outside of mosul. she met refugees who risked everything to escape. >> it is close to midnight on the front line just outside mosul. and these kurdish soldiers are hundreds of yards into no-man's land land. so some one coming? >> yes, they are not coming. >> reporter: they're not isis fighters. but a man and a teenage girl. the man strips to his underwear to be searched. guarded by the kurdish soldiers. who fear he could be a suicide bomber. but these people have risked death to escape isis. walking for miles through the night. and they're finally allowed to

and into safety. more men. some of them handing over guns. it is an extraordinary site. very few people have managed to leave mosul after isis began sealing it off. stopping civilians from fleeing. and banning cell phones. overcome with relief, these men wanted to tell us why they fled. but begged us to hide their identities. to protect family members, still in mosul. these are torture marks, said this man. they heated wire and use theed it to burn me. his only crime was smoking. illegal under isis, and its harsh interpretation of islamic law. this man said he saw another mosul resident beheaded after being caught with a cell phone

they caught you escapeingescaping, what would have happened? he told us three men were caught escaping just a few days ago. and isis hanged them in the street. they're a criminal gang cried this man. and we have been surviving on water and bread. is there any sign that isis is getting weaker? >> when they first came, they were tough, said this man. but now they can see that mosul is turning against them. the men told this a plan to fight against isis themselves now they're free. and to smuggle their wives and children out of mosul as soon as they can. this was just one night on the front line. but what we heard suggested people in mosul are growing increasingly angry with isis. and scott, that could make retaking the city a little easier. when iraqi forces eventually begin their offensive to

>> holly nice to have you here for once where nobody is shooting. holly williams, thank you very much for remark bum report. en a first, an american citizen fighting for isis. surrendered today in northern iraq. kurdish forces are holding him. they posted this video of him. he was said to be holding a virginia driver's license. the white house and the pentagon are working to confirm the american's identity. bob schieffer weighs in on the state of the gop and broadway comes to pennsylvaniach anew. the "cbs overnight news" will be right back. i think we should've taken a left at the river. tarzan know where tarzan go! tarzan does not know where tarzan go. hey, excuse me, do you know where the waterfall is? waterfall? no, me tarzan,

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the yale men's basketball team is going to the ncaa tournament for the first time in more than 50 years. but the campus is in an uproar after the team captain was expelled. jericka duncan is looking into this. >> when the yale bulldogs celebrated on sunday they were missing star point guard jack montague. today his attorney confirmed that in february, montage was expelled.

investigation found montague developed a relationship with a female student which led to consensual sex in 2014. but the fourth time they allegedly had sex that is in dispute. she states she did not consent. montague says she did. the team had to apologize after appearing to support montague wearing shirts with his nickname. posters appeared on campus warning the bulldogs to stop supporting rapists. >> somebody has to be here. >> head coach james jones says his players are trying to stay focused. >> in a situation like this you have to come in closer. believe in each other. fight harder. >> fighting sexual assault is an ongoing battle at yale. in 2015, a survey fund that more than 16% of yale students reported they had been a victim of sexual assault. mary havelin, executive director of new york city alliance against sexual assault. >> there has been an increase in

forward to report sexual assaults at yale. what does that say about the culture there? >> i actually think it says that we are getting better at what we are doing, perhaps. and that students are feeling more comfortable coming forward. >> the university says students are not expelled without careful consideration. scott, montague has the not been

>> basketball sheafob schieffer is next. bob schieffer covered every presidential election since 1964. none quite like this one. what do you make of it, bob? >> scott, i will tell you on the republican side. what we are seeing here is a changing of the guard. if trump wins the nomination for the convention and looks like he probably will it is going to turn the republican party on its ear. if it goes to an open convention, it will be a bloody fight that could break the party into two parties. and in either case, republican party scott, that we used to know it, will be replaced by something new, exactly what that will be, is uncertain. and that is the scariest part of all, because the one thing that always bodes ill in politics, economics or national security matters is just that. >> do you think trump could win the presidency? >> he could. historically, nominees from

do poorly when republicans split over civil rights in '64. nominated barry goldwatt r they want down to historic landslide defeat. when democrats kicked out party regulars and nominated george mcgovern in '72 he lost every state but massachusetts. under the old rule, scott, what this is coming down to is basically a couple of very flawed candidates. under the old rules. but in today's politics who knows what that means or where this is going. i certainly don't. >> bob schieffer, thank you for

alexander hamilton showed up at president obama welcomed alexander hamilton to the white house today. for an encore. here is chip reid.

called me. >> in 2009, lin manuel miranda, rapper and producer was invited to the white house. got a lot farther >> reporter: instead of the piece they expected he performed his brand new rap song about. >> alexander hamilton. his name is al, ander hamilton. >> it got a standing ovation. now seven years later, hamilton is the biggest hit on broadway. today, miranda was at the white house again along with the show's cast for a workshop with high school students. >> what do our favorite hip-hop artists do if not write about their struggle and circumstances so well that they transcend them. that's what hamilton did. >> what did i miss.

>> actor devite diggs plays jefferson as you have probably never seen him before. >> treg to eeying to erase as much distance between the audience and figures we knew as statues and paintings. we want to make these real people, flesh and blood people. >> at loudon high school in virginia, students preparing to perform at the white house workshop told us why they're so crazy about hamilton. >> memorize the raps. i know too much about life, and all of a sudden, because i listened to the song. takes these old dead people and they apply them to people that we see every day. and people that we interact they don't seem so dead and old. >> it's been a long time since the founding fathers have seen this live. what's your name alexander hamilton >> chip reid, cbs news, the

news" for this tuesday. for some of you the news continues. for others, check back with us a little bit later for the morning news. and cbs this morning. from the broadcast center in new york city. i'm scott pelley. >> announcer: this is the "cbs overnight news." welcome to the overnight news. i'm anna werner. a united states citizen captured in northern iraq and admits he was fighting for the islamic state.

>> the united states. >>awe 27-year-old mohamed amin, born in the u.s. to a palestinian father and iraqi mother. amin reportedly entered syria through turkey a couple month as go and made his way off to the isis held city of mosul. apparently mosul wasn't what he thought it would be and decided to make his way become to turkey. kurdish troops came upon amin outside the city of sinjarks he surrendered. carrying a virginia driver's license. couple credit card. three cell phones. and what he described as a large amount of turkish cash. he remains in kurdish custody. mohamed amin is lucky he got out alive. holly williams is is in iraq. >> reporter: it is close to midnight on the front line just outside mosul. these kurdish soldiers are hundreds of yards into no-man's land.

>> yes. >> they're not isis fighters. but a man and a teenage girl. the man strips to his underwear to be searched. guarded by the kurdish soldiers. who fear he could be a suicide bomber. these people have risked death to escape isis. walking for miles through the night. and they're finally allowed to cross through a trench. and into safety. and then, one by one, come 12 more men. some of them hanged over guns. it is an extraordinary sight. very few people have managed to leave mosul after isis began sealing it off. stopping civilians from fleeing. and banning cell phones. overcome with relief, these men wanted to tell us why they fled.

identitied to protect family members still living in mosul. these are torture marks said this man. they heated wire and used it to burn me. his only crime was smoking. illegal under isis. and its harsh interpretation of islamic law. this man said he saw another mosul resident beheaded after being caught with a cell phone sim card. >> they caught you escaping, what would have happened? >> he told us three men were caught escaping a few days ago. and isis hanged them in the street. they're a criminal gang cried this man. we have been surviving on water and breath. is there any sign that isis is getting weaker? when they first came, they were tough said this man. but now they can see that mosul

the men told us they plan to fight against isis themselves. now they're free. and to smuggle their wives and children out of mosul as soon as they can. here in the u.s., it could be a make or break day for several candidates on the presidential campaign trail. five states hold primaries today including the big winner take all states. of ohio and florida. marco rubio is hoping to resuscitate his flagging campaign in his home state. but the latest cbs news, battleground tracker shows donald trump with a big lead. and governor john kasich is vowing to make a stand in his home state of ohio. polls show him tied with trump. mayor garrett has more. >> i'm not going to take the low road. >> john kasich in a tight battle with donald trump in ohio. the first contest the state's governor has a chance to win. today he campaigned with 2012

>> this is the guy that ohio needs to vote for. america is counting on you. >> kasich told us trump has gone too far. >> will i think when you run a campaign where you are dividing one against another. making these incendiary comments at a rally. that's a toxic environment. not healthy. adding the world is watching. >> we are not in some third-world country where they're slugging each other. trying to figure out who won an election. we're in america. >> ted cruz, fighting trump for delegates niced an animal rights protester today. and di fused the situation. isn't it amazing how we can have that conversation without anyone getting violent. anyone insulting anybody. the stakes tomorrow were highest for marco rubio trailing trump in home state of florida. he also called for unity. >> tomorrow we have a chance to make a powerful statement to the country.

party is not going to allow itself to be hijacked by make conservatives and people who go around dividing us against each other. >> republican establishment has not found a way to slow trump's momentum. paul ryan who said he would work with trump if he is the nominee said in a radio vuntsidraidio interview said that it was unacceptable and blamed trump for some unrest. >> candidates need to take responsibility. there is never an excuse for promoting violence or a culture that presupposes it. >> ryan like republicans wary of trump said republican voter anger is real. but warned against adding fuel to the fire. ohio may show the nation just how hot that fire burns and whether it can be cooled or contained. major garrett, cbs news. >> for the democrats, bernie sanders is confident he will

clinton today. sanders skrd a surprise win last week in michigan and hopes for similar victories today in missouri, illinois and ohio. nancy cordes reports. sanders says the primary map is shifting in his favor. tomorrow he needs to prove it. in ohio, illinois, missouri, he has been hammering the message that delivered him a surprise win in nearby michigan last week. >> and the key difference between secretary clinton and myself. is not only did i vote against every one of these disastrous trade agreements, i helped lead the opposition to them. >> it prompted clinton to talk tougher on trade too. >> i will stop dead in its tracks any trade deal that hurts america.

worker. she tosses back a guinness in this weekend. and rallied with plumbers in chicago this morning. >> i'm going to fight for american labor. but it has been hard to ignore the elephant in the room. >> hey, bernie. get your people in line, bernie. since the elephant has been accusing sanders of sending supporters to disrupt trump rallies. >> donald trump is a pathologic liar. >> the "cbs overnight news" will be right back. it comes in oral rinse, spray or gel, so there's moisturizing relief for everyone. biotene, for people who suffer from a dry mouth. enough pressure in here for ya? i'm gonna take mucinex sinus-max. too late, we're about to take off. these dissolve fast. they're new liquid gels. and you're coming with me... you realize i have gold status?

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the battle between the u.s. government and apple over the encryption of its iphones has other tech companies working to increase their own privacy protections. facebook is working to expand

what'sapp to include voice calls. snapchat, google and twitter are making services more difficult for the government to hack. law enforcement officials around the world insist security should take precedence over privacy. lesley stahl reports for "60 minutes." >> reporter: the terrorists are able to communicate with impunity. >> reporter: the head prosecutor of paris. he investigated all the big acts of terrorism here. including "charlie hebdo," the kosher supermarket, and now the november 13 attacks where 130 people were killed. more than 350 wounded. do you have phones in terrorist attacks that you have not been able to get into? because of encryption? >> yes. yes. with all these encryption software programs we can't penetrate into certain conversations. we are dealing with the gigantic black hole. a dark zone.

things going on. >> it's not just phones. one of the things he is looking into is a texting app favored by isis called telegram. which like the new apple iphone offers advanced encryption. >> how often have you run in and all of your investigations into telegram. >> yes, very often. telegram. we can't penetrate. we can't get into it. >> usually people, install telegram on their phone. >> the inventer of pel gram.telegram. a young man without a country. russian born. wanders in exile. he created telegram so he could communicate in complete secrecy. it has taken off, used by over 100 million people. but it is also used by terrorists now. is this a concern for you? >> definitely. 100 million users, probably this

discussing are only a fraction of a fraction of a fraction of the potential usage. still we are trying to prevent it. >> telegram has become a go-to site for isis. they use it to widely disseminate propaganda like this video of the paris attackers training in syria. but isis fighters can also use telegram to send private messages to each other. to covertly plan and coordinate attacks. is there something on your site. on telegram that allows any messages. e-mails to disappear? vanish? >> yes, so in private messages we have this secret chat feature. which provides you with, self destruct timer. >> self destruct timer. >> you could set a specific amount of time. few second or a minute, or a week, up to which, after which

>> his obsession with secrecy and security stems from his own personal history. long before telegram, he was known as the mark zuckerberg of russia because he built a popular equivalent of facebook. in 2011. when anti-putin marches filled moscow streets. the kremlin demanded he take down the organizers sites. >> and -- i refused to do that. publicly. next day i head down to policemen on my doorstep. >> wonder why? >> they tried to break into my apartment. >> there was continual pressure on him to hand over users' personal data. culminating in 2014. when under kremlin duress, he was ousted from his own company. >> how long did you stay in russia after that? >> not a single day. >> o., then you fled? >> i feel that i am not welcome

>> that's when he created telegram. and encrypted it, he says, so activists could be assured that no government could ever access their personal data. he managed to leave russia with reported $300 million which he uses to single-handedly fund telegram, costing him, he says, over a million dollars a month. >> this was something that you created to allow democracy to flourish. to allow, dissidents in russia and other countries to communicate with each other thchblt you find out this terrorist group uses your site for completely different reasons. >> yeah, we were horrified. >> there is an irony there? >> there its. but you, know there is little you can do. because the if you allow this -- tool to be used for good, it, there will always be some people who misuse it.

hit paris on the night of november 13th. isis used telegram to take credit for the attacks. it was a wake-up call for european authorities. it is the first time ever in europe. that we had terrorists rampaging through our streets. first time we had terrorist thousands wearing suicide belts in heavily populated public areas. >> reporter: as head of europol he organizes information from 600 agencies. he set up a new countertrimerrorism center to coordinate. >> how much is encryption a problem. generally in these investigations? >> in most of them. across the -- across the tens of thousand of investigations that europol is supporting on terrorism and crime. 3/4 of them have encryption at the heart of the challenge that

>> what about november 13 attacks specifically. from what we see. encryption played a role in that part. that's something that we are digging into much deeper at the moment. >> why is it still a mystery. not so much a mystery. i can share details about a serious investigation in public. >> we know that the ringleader of the attack. 28-year-old. was a wanted fugitive. who golded authorities by bragging in the on line isis magazine how he alluded them. shuttling between europe and syria. he liked taking selfies of his exploits, often posting them online. in this gruesome video, he and his friend tie body to the back of a truck, abud in the driver's seat. >> we used to tow jet skis. now we tow infidels fighting us.

on everybody's radar screen. i mean -- >> you are right. abud, he has been one of the major targets for france and belgium. counterterrorism for many months. >> before paris, abud was suspected of guiding jihadis in attacks in france and belgium. the attempts were all foiled. in one of them. an iphone belonging to one of the jihadis was confiscated. it was not useful in finding abud because the is was encrypted. >> we have been told. i want to confirm it. that the encrypted phone may have prevented you from getting information about the paris attacks. >> that is a theory that need to be looked into. to do so we really need to be able to get into that phone. you know, i say, all of these smart phones make justice blind. because they deprive us of information that can contribute to our investigation. >> see the full report on our website.

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for massage and intimacy. every touch, gently intensified. a little touch is all it takes. k-y touch. random shootings and fear of terrorism have a lot of people testing the limits of bulletproof. our correspondent has that story. >> reporter: this may look like your average every day auto

call teal control. quality control. [ gunfire ] trent kimble is the confident and brave founder and ceo of texas armor incorporation, a san antonio-based company that turns ordinary cars into rolling fortresses. >> these aren't bait trucks that we are talking about. these are passenger vehicles that can stop any type of rifle round or handgun even up to a hand grenades, ieds, those explosive explosives. bulletproof does not exist. all of our vehicles are bullet resistant. not like the movies. bullets don't bounce. it catches the bullet. the glass will crack. it will splinter. >> reporter: don't want it to penetrate through. >> correct it is not going to penetrate. >> tearing cars done to their skeletons, kimble and his crew install custom ballistic steel plates and glass. and then put it all back

the cost to armor a car goes from $40,000 on up. and kimble says business is good. and getting better. >> economic stress on the, in the world, the economic downturn, the terrorism, that type of world that we live in nowadays is, is -- good for business. unfortunately. >> going hot here. just a second. >> who need these armored vehicles? >> so our clientele range from heads of state of foreign countries all the way done to a soccer mom here in the u.s. kidnapping? protection against assault from an angry soccer parent? >> outside the u.s. mainly kidnapping for ransom. inside the u.s., usually protecting just against street crime. >> when i got hit.

>> this detective, nypd, knows firsthand value of protection. in 2013 he was shot in his ballistic vest during a routine stop for a minor subway violation. >> gentleman gets up. he starts walking towards the train car door. i see him reach into his waistband like a jerk motion with his hands. first round goes off. strikes me in my vest. >> you are hit where, exactly? vest. thankfully stopped it. pierced the vest a little bit. but enough that all i had was a giant bruise. >> the first commercially available bullet resistant vest was invented in 1893 by a chicago catholic priest named kazamir zagland. proved his garment worked by having himself shot in front of an audience. soon, high-profile people around the world bought the silk and steel vest including arch buick france ferdinand of austria.

to wear his vest, june 28, 1914, when an assassin shot and killed him igniting world war i. recent experiments, proved the invention could have stopped that fateful shot. fortunately for detective levae he didn't forget to put his vest on. >> i am here because the vest saved my life. i try to be the guy to talk to some of the younger officers and just, listen, take, take care of yourself. you could get into a dangerous situation, watch yourself.

be careful out there. parts of the south are still under water after the latest round of devastating floods. but it could have been worse. the national weather service says a pair of new supercomputers gave people a lot more advance warning of what was headed their way. demarco morgan reports.

>> last fall's flooding from hurricane joaquin in the south and the winter's monster blizzard in the northeast were predicted early and accurately by the computers. longer lead time gave people a chance to prepare. >> we know forecasts save lives. >> and he is the director of the national weather service. >> as we get closer to an event we can make the forecast with greater resolution and more accuracy. so people can see where specifically the storms will affect. >> one half of the government's 44.5 million improvement to their forecasting system. trillions of observations are gathered from weather balloons, satellites and buoys among other things. the super computers run models off that data to predict the weather. american model known as gfs, miscalculated the path of super storm sandy in 2012. the hurricane killed 150 people and caused estimated $68 billion

sandy was certainly a turning point in the entire enterprise. it really brought attention to the, the super computing capacity that we had prior to sandy versus what other operational centers around the world had. five days before the storm, the european model correctly predicted sandy would slam into the new jersey shoreline. severe weather expert with new york station, showed me how the predictions varied. >> this green line, the european model forecast. this is a week away from landfall. >> american model shows a decidedly different route. >> can you shoisw us the storm path? >> remember the european model track. look how the storm performed. took the hard left hand bank. the landfall. maybe a 50-mile difference or so. >> in 2015, an employee of the national weather service, tweeted an apology for

that turned out to be a bust. >> so many people looked at the forecast. head for the hills. >> never have seen an apology. >> the agency believes the new system will help forecasters get a better handle on short term daily, not just big weather events. >> wealth of information coming at us over the next year which lend confidence we will produce a bet forecast. >> that's the overnight news for tuesday. for some the news continues. for others check back later for city, i'm anna werner. on the eve of the high-stakes primaries getting out the vote and tossing out the protesters. >> get them out of here! get them out of here. >> the rhetoric he uses is irresponsible. >> that's a toxic environment. it's not healthy. >> also tonight, what has isis done with 2 million people?

survivors of the city cut off from the world. a tornado carves through a midwest community. and, mr. hamilton goes to washington. broadway makes history at the white house. alexander hamilton >> announcer: this is the "cbs overnight news." we are just hours away from the most critical primaries yet with five big states today. for the first time, the republican winner will take all of the delegates in two states, florida and ohio, in florida our cbs news battleground tracker poll shows donald trump leading senator marco rubio 2:1 on rubio's home turf. today could be good-bye rubio tuesday. and it's do-or-die for governor john kasich in ohio. he and trump essentially tied there. overshadowing all of this, continuing protests and occasional violence at trump rallies. major garrett begins our coverage. >> i am not going to take the

>> john kasich in a tight battle with donald trump in ohio. the first contest the state's governor has a chance to win. today he campaigned with 2012 gop nominee mitt romney who urged republicans to choose any one but trump. >> so this is the guy ohio needs to vote for. america is counting on you. >> kasich told us, trump has gone too far. >> i think when you run a campaign dividing one against another. making comments at a rally. it is toxic environment. >> reporter: adding that the world is now watching. >> we are not in some third-world country where they're slugging each other trying to figure out who won an election. we're in america. >> ted cruz fighting trump for delegates in tomorrow's contest in illinois and missouri faced animal rights protester today.

>> reporter: and diffused the situation. >> isn't it amazing how we can have that conversation what any one getting violent, anyone insulting anybody? >> thank you so much. >> reporter: the stakes are highest for marco rubio, trailing trump in his home state of florida and he also called for unity. >> tomorrow we have a chance to make a powerful statement to the country. that its that the republican party is not going to allow itself to be hijacked by fake conservatives and people who go around dividing us against each other. >> the republican establishment has not found a way to slow trump's momentum. house speaker paul ryan who recently said he would work with trump if he is the nominee said in a radio interview today that protest tactics at rallies were unacceptable and blamed trump for some of the unrest. >> i think the candidates need to take responsibility. there is never an excuse for

>> reporter: ryan like so many republicans wary of trump said anger among republicans is real. but he warned against fueling the fire. scott, ohio tomorrow may show the country how hot that fire burns. and whether it can be cooled or contained. >> major investigate. thanks. a hot moment over the weekend when one protester seemed to go at trump himself. no one has been seriously injured in all of this. but the disruptions keep coming. here's dean reynolds. >> get him out of here. get him out of here. >> reporter: it was business as usual at donald trump's rally today in tampa. >> get her out, please. >> reporter: emotions are running high at these events now because of what trump calls the disrupters. with him in tampa today, sarah palin electrified the crowd this way. >> what we don't have time for is all of that petty, punk-ass little thuggery stuff that's

"protesters." >> it was a reference to dayton saturday where one protester actually rushed the stage. to kansas city where trump could barely finish a sentence. and to chicago where scuffles friday night between trump supporters and a large contingent of protesters inside the hall spilled out on to the street. trump campaign canceled the rally for security reasons. there were five arrests. university of illinois student jeremy mazur said the anti-trump demonstration was well planned. >> tons of student organizations all over the campus got together. had meetings all week to stop this atrocity from happening. >> in tampa we asked betty myrick and marsha craig about that as they headed into the third trump rally. >> reporter: are either concerned about the demonstrators and hecklers? >> i am very concerned about them. i think the government,

them. because they're impeding the ability of donald to get out his message and free speech. >> reporter: trump does more than shout down his tormenters. >> go home to mom. go home to mommy. >> reporter: he baits them. >> look to punch them in the face, i till you. >> reporter: last week, one supporters did just that to a protester. from temperature said he may pay the puncher's legal fees. another thing that was notable about today's event in tampa, scott, is that trump security detail was considerably larger. perhaps twice the size of what it has been at previous rallies. >> dean reynolds. anks. big day tomorrow for the mocrats as well. d a late night for them likely illinois. r battleground tracker poll there shows hillary clinton and bernie sanders neck and neck. nancy cordes is covering the democrats. [ applause ] >> reporter: sanders says the primary map is shifting in his favor.

with strong performances in a trio of midwestern states. >> this state lost 300,000 manufacturing jobs. >> reporter: in ohio, illinois and missouri, he has been hammering the message that delivered him a surprise win in nearby michigan last weak. >> and the key difference between secretary clinton and myself is not only did i vote against every one of these disastrous trade agreements i helped lead the on sequestration to them. >> reporter: prompted clinton to talk tougher on trade too. >> i will stop dead in its tracks any trade deal that hurts america. >> reporter: argues she is the candidate of the american worker. she tossed back a guinness in blue-collar youngstown, ohio this weekend. >> hillary! hillary! >> reporter: and rallied with

morning. >> i'm going to fight for american labor. >> reporter: it has been hard to ignore the elephant in the room. >> bernie, get your people in line, bernie. >> reporter: especially since that elephant has been accusing sanders of sending supporters to disrupt trump rallies. >> donald trump is a pathologic liar. >> reporter: both candidates have grown increasingly caustic in their criticism of trump. in fact tonight, scott, in illinois, clinton accused him of citing the kind of mob olence she said used to lead lynchings. nancy cordes, thanks. e "cbs overnight news" will be right back. almost sixty million americans are affected by mental illness. together we can help them with three simple words. my name is chris noth and i will listen. from maine to maui, thousands of high school students across the country are getting in on the action

chris young: action teams of high school students are joining volunteers of america and major league baseball players to help train and inspire the next generation of volunteers. carlos pea: it's easy to start an action team at your school so you, too, can get in on the action.

if you were a hippie in the '60s, you need to know. it's the dawning of the age of aquarius. yeah, and something else that's cool. what? osteoporosis is preventable. all: osteo's preventable? right on! if you dig your bones, protect them. all: cbs cares! now we will turn for insight to anthony salvato cbs director of elections expert on delegate math and all of the rules of the primaries and caucuses.

tomorrow, if donald trump wins florida and ohio, will his nomination be inevitable. >> he will be all but certain. he won't clinch but a commanding lead in delegates and commanding position to get the rest that he needs. first because the rules now start to change the way that states give out delegates with more winner take all contests, tends to favor the leader and candidates look cruz and kasich to catch up. but more than that, trump will also be heading into a map beyond tuesday that should favor him politically. there will be contests in the northeast in the west. places that are full of the kind of blue-collar, suburban republicans voteding for him already. so the thinking will go if they

tomorrow, in places like florida, ohio, hard to see huh they suddenly find a way to stop him at all. >> what happens tomorrow if trump wins florida, as seems likely now, but loses ohio? which is possible. it will become much harder r him to win the nomination t right. at's what his opponents, cruz d kasich are hoping for. ow him down if not to catch him. a glimmer of hop to those who want to see this process go on. into the spring, maybe into the summer, and to the convention. >> anthony salvanto, cbs news director of elections. thank you. severe storms including a tornado swept through western ohio today. cell phone video captured the twister on the ground. north west of dayton. there were no injuries reported. a number of buildings were damaged. floodwaters are rising in the

relentless rain. the pearl river on the louisiana/mississippi border expected to crest tomorrow. at the same height as a devastating flood in 19 # 3. as much as 2 feet of rain fell across the region. six people have died. re than 6,000 buildings in uisiana have been damaged. > two people are in critical ndition tonight. others were also injured when amtrak train flew off the ils overnight near dodge city, nsas. the southwest chief was headed from los angeles to chicago, when the engineer noticed a twisted rail ahead. he hit the emergency brake, but it was too late. investigators are checking to see if an earlier vehicle accident bent that rail. in a surprise move today, russian president vladamir putin declared mission accomplished in syria. and said he is ordering the withdrawal of most russian forces. since september, russian war planes have pounded opponents of syria's assad dictatorship turning the tide of the 5-year-old civil war. with russian air cover, assad's forces have captured considerable territory from the rebels. a partial cease-fire has reduced, but not eliminated the

the cease-fire does not apply to isis, which still controls about a third of syria and iraq. including the city of mosul with nearly 2 million residents which has been cut off from the world since isis took over in 2014. well, tonight. holly williams has rare insight into what is happening there. outside of mosul. she met refugees who risked everything to escape. >> it is close to midnight on the front line just outside mosul. and these kurdish soldiers are hundreds of yards into no-man's land. so some one coming? >> yes, they are not coming. >> reporter: they're not isis fighters. but a man and a teenage girl. the man strips to his underwear to be searched. guarded by the kurdish soldiers. who fear he could be a suicide bomber.

death to escape isis. walking for miles through the night. and they're finally allowed to cross through a trench. and into safety. and then one by one, come 12 more men. some of them handing over guns. it is an extraordinary site. leave mosul after isis began sealing it off. stopping civilians from fleeing. and banning cell phones. overcome with relief, these men wanted to tell us why they fled. but begged us to hide their identities. to protect family members, still in mosul. these are torture marks, said this man. it to burn me. his only crime was smoking. harsh interpretation of islamic law. this man said he saw another mosul resident beheaded after being caught with a cell phone sim card.

would have happened? he told us three men were caught escaping just a few days ago. and isis hanged them in the street. they're a criminal gang cried this man. and we have been surviving on water and bread. is there any sign that isis is getting weaker? >> when they first came, they were tough, said this man. but now they can see that mosul is turning against them. the men told this a plan to fight against isis themselves now they're free. and to smuggle their wives and children out of mosul as soon as they can. this was just one night on the front line. but what we heard suggested

and scott, that could make retaking the city a little easier. when iraqi forces eventually begin their offensive to recapture mosul. holly nice to have you here r once where nobody is ooting. lly williams, thank you very much for a remarkable report. in a first, an american citizen fighting for isis. surrendered today in northern iraq. kurdish forces are holding him. they posted this video of him. he was said to be holding a virginia driver's license. the white house and the pentagon are working to confirm the american's identity. >> bob schieffer weighs in on the state of the gop and broadway comes to pennsylvania avenue. the "cbs overnight news" will be right back. in our house, imagination runs wild. but at my table, i keep the food real. like country crock's recipe made with real simple ingredients. and no artificial flavors or preservatives. real country fresh taste from real ingredients. welcome to crock country. uh, hello geico?... yeah, i was just talking about your

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the yale men's basketball team is going to the ncaa tournament for the first time in more than 50 years. but the campus is in an uproar after the team captain was expelled. jericka duncan is looking into this. >> when the yale bulldogs celebrated on sunday they were missing star point guard jack montague. today his attorney confirmed that in february, montage was expelled. an independent yale investigation found montague developed a relationship with a

but the fourth time they allegedly had sex that is in dispute. she states she did not consent. montague says she did. the team had to apologize after appearing to support montague wearing shirts with his nickname. posters appeared on campus warning the bulldogs to stop supporting rapists. >> somebody has to be here. >> head coach james jones says his players are trying to stay focused. >> in a situation like this you have to come in closer. believe in each other. fight harder. >> fighting sexual assault is an ongoing battle at yale. in 2015, a survey fund that more than 16% of yale students reported they had been a victim of sexual assault. mary havelin, executive director of new york city alliance against sexual assault. >> there has been an increase in

forward to report sexual assaults at yale. what does that say about the culture there? >> i actually think it says that we are getting better at what we are doing, perhaps. and that students are feeling more comfortable coming forward. >> the university says students are not expelled without careful consideration. scott, montague has the not been

>> bob schieffer is next. bob schieffer covered every presidential election since 1964. none quite like this one. what do you make of it, bob? >> scott, i will tell you on the republican side. what we are seeing here is a changing of the guard. if trump wins the nomination for the convention and looks like he probably will it is going to turn the republican party on its ear. if it goes to an open convention, it will be a bloody fight that could break the party into two parties. and in either case, republican party scott, that we used to know it, will be replaced by something new, exactly what that will be, is uncertain. and that is the scariest part of all, because the one thing that always bodes ill in politics, economics or national security matters is just that. >> do you think trump could win the presidency?

historically, nominees from outside their party mainstream do poorly when republicans split over civil rights in '64. nominated barry goldwatt r they want down to historic landslide defeat. when democrats kicked out party regulars and nominated george mcgovern in '72 he lost every state but massachusetts. under the old rule, scott, what this is coming down to is basically a couple of very flawed candidates. under the old rules. but in today's politics who knows what that means or where this is going. i certainly don't. >> bob schieffer, thank you for the insight. alexander hamilton showed up at

we will have that story next. president obama welcomed alexander hamilton to the white house today.

here is chip reid. >> i'm thrilled the white house called me. >> in 2009, lin manuel miranda, rapper and producer was invited to the white house. got a lot farther >> reporter: instead of the piece they expected he performed his brand new rap song about. >> alexander hamilton. his name is al, ander hamilton. >> it got a standing ovation. now seven years later, hamilton is the biggest hit on broadway. today, miranda was at the white house again along with the show's cast for a workshop with high school students. >> what do our favorite hip-hop artists do if not write about their struggle and circumstances so well that they transcend them. that's what hamilton did.

what did i miss >> actor devite diggs plays jefferson as you have probably never seen him before. >> trying to erase as much distance between the audience and figures we knew as statues and paintings. we want to make these real people, flesh and blood people. >> at loudon high school in virginia, students preparing to perform at the white house workshop told us why they're so crazy about hamilton. >> memorize the raps. i know too much about life, and all of a sudden, because i listened to the song. takes these old dead people and they apply them to people that we see every day. and people that we interact with. they don't seem so dead and old. >> it's been a long time since the founding fathers have seen this live. what's your name alexander hamilton >> chip reid, cbs news, the white house. >> that's the "cbs overnight ws" for this tuesday.

continues. for others, check back with us a little bit later for the morning news. and cbs this morning. from the broadcast center in new york city. i'm scott pelley. >> announcer: this is the "cbs overnight news." welcome to the overnight news. i'm anna werner. a united states citizen captured in northern iraq and admits he was fighting for the islamic state. >> where are you from?

>> reporter: 27-year-old mohamed amin is from virginia, awe 27-year-old mohamed amin, born in the u.s. to a palestinian father and iraqi mother. amin reportedly entered syria through turkey a couple month as go and made his way off to the isis held city of mosul. apparently mosul wasn't what he thought it would be and decided to make his way become to turkey. kurdish troops came upon amin outside the city of sinjarks he surrendered. carrying a virginia driver's license. couple credit card. three cell phones. and what he described as a large he remains in kurdish custody. mohamed amin is lucky he got out alive. holly williams is is in iraq. >> reporter: it is close to midnight on the front line just outside mosul.

hundreds of yards into no-man's land. some one coming? >> yes. >> they're not isis fighters. but a man and a teenage girl. the man strips to his underwear to be searched. guarded by the kurdish soldiers. who fear he could be a suicide bomber. these people have risked death to escape isis. walking for miles through the night. and they're finally allowed to cross through a trench. and into safety. and then, one by one, come 12 more men. some of them hanged over guns. it is an extraordinary sight. very few people have managed to leave mosul after isis began sealing it off. stopping civilians from fleeing. and banning cell phones. overcome with relief, these men

but begged us to hide their identities to protect family members still living in mosul. these are torture marks said this man. they heated wire and used it to burn me. his only crime was smoking. illegal under isis. and its harsh interpretation of islamic law. this man said he saw another mosul resident beheaded after being caught with a cell phone sim card. >> they caught you escaping, what would have happened? >> he told us three men were caught escaping a few days ago. and isis hanged them in the

they're a criminal gang cried this man. we have been surviving on water and breath. is there any sign that isis is getting weaker? when they first came, they were tough said this man. but now they can see that mosul is turning against them. the men told us they plan to fight against isis themselves. now they're free. d to smuggle their wives and ildren out of mosul as soon as ey can. here in the u.s., it could be a make or break day for several candidates on the presidential campaign trail. five states hold primaries today including the big winner take all states. of ohio and florida. marco rubio is hoping to resuscitate his flagging campaign in his home state. but the latest cbs news, battleground tracker shows donald trump with a big lead. and governor john kasich is vowing to make a stand in his home state of ohio. polls show him tied with trump. mayor garrett has more. >> i'm not going to take the low road. >> john kasich in a tight battle with donald trump in ohio. the first contest the state's governor has a chance to win. today he campaigned with 2012 gop nominee, mitt romney. who has urged republicans to

>> this is the guy that ohio needs to vote for. america is counting on you. >> kasich told us trump has gone too far. >> will i think when you run a campaign where you are dividing one against another. making these incendiary comments at a rally. that's a toxic environment. not healthy. adding the world is watching. >> we are not in some third-world country where they're slugging each other. trying to figure out who won an election. we're in america. >> ted cruz, fighting trump for delegates faced an animal rights protester today. and diffused the situation. isn't it amazing how we can have that conversation without anyone getting violent. anyone insulting anybody. the stakes tomorrow were highest for marco rubio trailing trump in home state of florida. he also called for unity.

make a powerful statement to the country. that is that the republican party is not going to allow itself to be hijacked by make conservatives and people who go around dividing us against each other. >> republican establishment has not found a way to slow trump's momentum. paul ryan who said he would work with trump if he is the nominee said in a raidio interview said that it was unacceptable and amed trump for some unrest. candidates need to take sponsibility. ere is never an excuse for promoting violence or a culture that presupposes it. >> ryan like republicans wary of trump said republican voter anger is real. but warned against adding fuel to the fire. ohio may show the nation just how hot that fire burns and whether it can be cooled or contained. major garrett, cbs news.

sanders is confident he will close the delegate gap on clinton today. sanders scored a surprise win last week in michigan and hopes for similar victories today in missouri, illinois and ohio. nancy cordes reports. sanders says the primary map is shifting in his favor. tomorrow he needs to prove it. in ohio, illinois, missouri, he has been hammering the message that delivered him a surprise win in nearby michigan last week. >> and the key difference between secretary clinton and myself. is not only did i vote against every one of these disastrous trade agreements, i helped lead the opposition to them. >> it prompted clinton to talk tougher on trade too.

tracks any trade deal that hurts america. >> and argues she is the candidate of the american worker. she tosses back a guinness in blue-collar youngstown, ohio this weekend. and rallied with plumbers in chicago this morning. >> i'm going to fight for american labor. but it has been hard to ignore the elephant in the room. >> hey, bernie. get your people in line, bernie. since the elephant has been accusing sanders of sending supporters to disrupt trump rallies. >> donald trump is a pathologic liar. >> the "cbs overnight news" will be right back. the battle between the u.s. enough pressure in here for ya? i'm gonna take mucinex sinus-max. too late, we're about to take off. these dissolve fast. they're new liquid gels. and you're coming with me... you realize i have gold status?

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its secure messaging service whatsapp to include voice calls. snapchat, google and twitter are making services more difficult for the government to hack. law enforcement officials around the world insist security should take precedence over privacy. lesley stahl reports for "60 minutes." >> reporter: the terrorists are able to communicate with impunity. >> reporter: france wa molan is the head prosecutor of paris. of terrorism here. including "charlie hebdo," the kosher supermarket, and now the november 13 attacks where 130 people were killed. more than 350 wounded. do you have phones in terrorist attacks that you have not been able to get into? because of encryption? >> yes. yes. with all these encryption software programs we can't

conversations. we are dealing with the gigantic black hole. a dark zone. there are so many dangerous things going on. >> it's not just phones. one of the things he is looking into is a texting app favored by isis called telegram. which like the new apple iphone offers advanced encryption. >> how often have you run in and all of your investigations into telegram. >> yes, very often. telegram. can't penetrate. can't get into it. usually people, install legram on their phone. the inventer of telegram. young man without a country. russian born. wanders in exile. he created telegram so he could communicate in complete secrecy. it has taken off, used by over 100 million people. but it is also used by terrorists now.

>> definitely. 100 million users, probably this illegal activity we are discussing are only a fraction of a fraction of a fraction of the potential usage. still we are trying to prevent it. >> telegram has become a go-to site for isis. they use it to widely disseminate propaganda like this video of the paris attackers training in syria. but isis fighters can also use telegram to send private messages to each other. to covertly plan and coordinate attacks. is there something on your site. on telegram that allows any messages. e-mails to disappear? vanish? >> yes, so in private messages we have this secret chat feature. which provides you with, self destruct timer. >> self destruct timer. >> you could set a specific amount of time. few second or a minute, or a week, up to which, after which

>> his obsession with secrecy and security stems from his own personal history. long before telegram, he was known as the mark zuckerberg of russia because he built a popular equivalent of facebook. in 2011. when anti-putin marches filled moscow streets. the kremlin demanded he take down the organizers sites. >> and -- i refused to do that. publicly. next day i head down to policemen on my doorstep. >> wonder why? >> they tried to break into my apartment. >> there was continual pressure on him to hand over users' personal data. culminating in 2014. when under kremlin duress, he was ousted from his own company. >> how long did you stay in russia after that? >> not a single day.

>> i feel that i am not welcome at that country anymore. >> that's when he created telegram. and encrypted it, he says, so activists could be assured that o government could ever access their personal data. he managed to leave russia with reported $300 million which he telegram, costing him, he says, over a million dollars a month. >> this was something that you created to allow democracy to flourish. to allow, dissidents in russia and other countries to communicate with each other then all of a sudden you find out this terrorist group uses your site for completely different reasons. >> yeah, we were horrified. >> there is an irony there? >> there its. but you, know there is little you can do. because the if you allow this -- tool to be used for good, it, there will always be some people

just hours after the terrorists hit paris on the night of november 13th. isis used telegram to take credit for the attacks. it was a wake-up call for european authorities. it is the first time ever in europe. that we had terrorists rampaging through our streets. first time we had terrorist thousands wearing suicide belts in heavily populated public areas. >> reporter: as head of europol he organizes information from 600 agencies. he set up a new counterterrorism center to coordinate. >> how much is encryption a problem. generally in these vestigations? >> in most of them. across the -- across the tens of thousand of investigations that europol is supporting on

the heart of the challenge that law enforcement face. >> what about november 13 attacks specifically. from what we see. encryption played a role in that part. that's something that we are digging into much deeper at the moment. >> why is it still a mystery. not so much a mystery. i can share details about a serious investigation in public. >> we know that the ringleader of the attack. 28-year-old abdul hamid al-baljiki was a wanted fugiive. who golded authorities by bragging in the on line isis magazine how he alluded them. shuttling between europe and syria. he liked taking selfies of his ploits, often posting them line. in this gruesome video, he and his friends tie bodies to the back of a truck, abud in the driver's seat. >> we used to tow jet skis. now we tow infidels fighting us. >> what is astonishing is, you knew he was.

i mean -- >> you are right. abud, he has been one of the major targets for france and belgium. counterterrorism for many months. >> before paris, abud was suspected of guiding jihadis in attacks in france and belgium. the attempts were all foiled. in one of them, an iphone belonging to one of the jihadis was confiscated. it was not useful in finding abud because the is was encrypted. >> we have been told -- and i want to confirm it -- that the encrypted phone may have prevented you from getting information about the paris attacks. >> that is a theory that need to be looked into. to do so we really need to be able to get into that phone. you know, i say, all of these smart phones make justice blind. because they deprive us of information that can contribute to our investigation. >> see the full report on our website.

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random shootings and fear of terrorism have a lot of people testing the limits of bulletproof. our correspondent has that story. >> reporter: this may look like your average every day auto shop, except for one thing. quality control.

trent kimble is the confident and brave founder and ceo of texas armor incorporation, a san antonio-based company that turns ordinary cars into rolling fortresses. >> these aren't bait trucks that we are talking about. these are passenger vehicles that can stop any type of rifle round or handgun even up to a hand grenades, ieds, those explosives. bulletproof does not exist. all of our vehicles are bullet resistant. not like the movies. bullets don't bounce. it catches the bullet. the glass will crack. it will splinter. >> reporter: don't want it to penetrate through. >> correct it is not going to penetrate. >> tearing cars done to their

install custom ballistic steel plates and glass. and then put it all back together as good as new. the cost to armor a car goes from $40,000 on up. and kimble says business is good. and getting better. >> economic stress on the, in e world, the economic wnturn, the terrorism, that type of world that we live in nowadays is, is -- good for business. unfortunately. >> going hot here. just a second. >> who need these armored vehicles? >> so our clientele range from heads of state of foreign countries all the way done to a soccer mom here in the u.s. >> protection against kidnapping? protection against assault from an angry soccer parent? >> outside the u.s. mainly kidnapping for ransom. inside the u.s., usually protecting just against street crime. >> when i got hit. first, felt like a ton of bricks.

firsthand value of protection. in 2013 he was shot in his ballistic vest during a routine stop for a minor subway violation. >> gentleman gets up. he starts walking towards the train car door. i see him reach into his waistband like a jerk motion with his hands. pulls out a gun. first round goes off. strikes me in my vest. >> you are hit where, exactly? >> pretty much dead center of vest. thankfully stopped it. pierced the vest a little bit. but enough that all i had was a giant bruise. >> the first commercially available bullet resistant vest was invented in 1893 by a chicago catholic priest named kazamir zagland. proved his garment worked by having himself shot in front of an audience. soon, high-profile people around the world bought the silk and steel vest including arch buick

but ferdinand reportedly forgot to wear his vest, june 28, 1914, when an assassin shot and killed him igniting world war i. recent experiments, proved the invention could have stopped that fateful shot. fortunately for detective levae he didn't forget to put his vest on. >> i am here because the vest saved my life. i try to be the guy to talk to some of the younger officers and just, listen, take, take care of yourself.

parts of the south are still under water after the latest round of devastating floods. but it could have been worse. the national weather service says a pair of new supercomputers gave people a lot more advance warning of what was headed their way. demarco morgan reports. >> my god, the truck is sinking.

hurricane joaquin in the south and the winter's monster blizzard in the northeast were predicted early and accurately by the computers. longer lead time gave people a chance to prepare. >> we know forecasts save lives. >> and he is the director of the national weather service. >> as we get closer to an event we can make the forecast with greater resolution and more accuracy. so people can see where specifically the storms will affect. >> one half of the government's 44.5 million improvement to their forecasting system. trillions of observations are gathered from weather balloons, satellites and buoys among other things. the super computers run models off that data to predict the weather. american model known as gfs, miscalculated the path of super storm sandy in 2012. the hurricane killed 150 people and caused estimated $68 billion of damage. sandy was certainly a turning

it really brought attention to the, the super computing capacity that we had prior to sandy versus what other operational centers around the world had. five days before the storm, the european model correctly edicted sandy would slam into e new jersey shoreline. vere weather expert with new rk station, showed me how the edictions varied. >> this green line, the european model forecast. this is a week away from landfall. >> american model shows a decidedly different route. >> can you show us the storm path? >> remember the european model track. look how the storm performed. took the hard left hand bank. the landfall. maybe a 50-mile difference or so. >> in 2015, an employee of the national weather service, tweeted an apology for overestimating the snowstorm that turned out to be a bust. >> so many people looked at the forecast. head for the hills. >> never have seen an apology. >> the agency believes the new system will help forecasters get a better handle on short term

events. it's tuesday, march 15th, 2016.

a day in the race for the white house. donald trump could put even more distance between himself and his republican rivals while bernie sanders looks to cut even deeper into hillary clinton's lead. an american in isis? kurdish forces say they captured a man from the washington, d.c., suburbs who was fighting for the terror group. a maryland police officer is killed by friendly fire in a shootout that was recorded by the alleged gunman's brothers. and just how smart is your phone? a new study finds you might not want to turn to those popular voice assistance in the event of an emergency. good morning from the studio 57 newsroom at cbs news headquarters in new york. good to be with you. i'm anne-marie green. we begin with politics and a day that could be pivotal for presidential hopefuls in both parties. five key states hold primaries today.