tomorrow night, president obama will join cnn's anderson cooper and a live audience for a cnn primetime event, "guns in america" airs at 8:00 p.m. eastern tomorrow night. thanks very much for watching. i'm wolf blitzer in "the situation room." erin burnett "outfront" starts right now. next, north korea's nuclear threat. kim jong-un says his country has exploded a massive hydrogen bomb. is kim's claim even true? plus, cnn speaks with the republican front-runners donald trump and ted cruz. trump doubles down on the cruz birther issue and ted cruz fires back. and an exclusive "outfront" investigation. inside an active shooter situation. can an armed civilian stop a massacre? let's go "outfront." good evening. i'm kate bolduan in for erin

burnett. nuclear nightmare. the world is struggling with how to respond after a hydrogen bomb was discovered by north korea. if true, it could pose a threat to the united states. kim jong-un congratulating himself in a statement saying the test is forcing the world to, quote, look up to our strong nuclear country. cnn's chief national security correspondent jim sciutto is "outfront" tonight. it seems like it's going to be a while before the u.s. or anyone can really say with certainty what happened here. >> well, that's true. the white house is fairly confident now as are other nuclear experts we've spoken to. a yield of this explosion, that said, it's very possible, very plausible that they made progress along the way to a hydrogen bomb and shrinking

nuclear device that north korea already has. those questions still unanswered. within hours of north korea claiming its first hydrogen bomb test, republican candidates already had a scapegoat, the obama foreign policy. donald trump telling wolf blitzer -- >> china has total control over them and we have total control over china if they knew what they were doing, which we don't. >> reporter: much like his fellow candidates had earlier in the date. >> this is what a weak american leadership gets you. americans should be very, very concerned. >> it's an example of a withdrawn american in the world. >> reporter: north koreans cheered in the streets following the bold announcement of a first for the isolated nation. a successful test of a hydrogen bomb, many times more powerful than the atomic bomb pyongyang

has already developed. while international monitors worked to determine the exact power of the blast. >> signals were detected on seismic stations and they were immediately made available to all of our member states. >> but by this afternoon, the white house was already undermining north korea's claim. >> the initial analysis that's been conducted of the events that were reported overnight is not consistent with north korean's claim of a successful hydrogen bomb test. >> reporter: still, the debt nation at an underground facility is the fourth by north korea since 2006, all in gross violation of the international law and prior nuclear agreements with the west. most nuclear analysts share the administration's doubt of the h-bomb. including the possibility of advancements and building device

small enough to deploy on a missile. and north korea has developed a missile capable of reaching as far as the west coast of the u.s. >> if you can add a little hydrogen isotope to your basic atomic bomb, you can have less material in it, make it smaller, and this will help north korea fit it on the warhead of a missile. it doesn't look like they got there. >> this test is certainly intended to send a message to multiple audiences. the regime's credibility based in large part on it you power to the u.s. it's a message of defiance but also to china which is typically and traditionally been north korea's only ally. it's a message that is not necessarily listening to china anymore. and kate, that is truly an alarming development because it means that really that regime is not listening to anyone. >> who has the leverage then. exactly. jim sciutto, thank you so much. "outfront" with us now,

gordon chang, author of "north korea takes on the world." and congressman turner. thank you for joining us, gentlemen. the view of the u.s. was that this was not a hydrogen bomb. you still say this pose as direct threat to the united states. why? >> absolutely. whether this is a hydrogen test or a nuclear test, this would be the third test that north korea has undertaken during president obama's presidency. the president has stated that he had a goal entering his two terms here that we would have a world without nuclear weapons yet this is not on the to-do list of the administration. i wrote a letter to the president asking him to address this in his state of the union. your cnn piece was an excellent description that north korea has nuclear capability and missile technology that places the united states at risk. that is the same whether it's a hydrogen bomb or nuclear bomb. >> and gordon, even if this

isn't a hydrogen bomb and you don't think it was, north korea sure wants the world to think that it was. why is kim jong-un doing this now, do you think? >> i think this is internal regime politics. kim jong-un has been at the top of the north korean political system for more than four years but he hasn't really consolidated control. and a detonation says a couple of things. first of all, that he's strong and can move north korea in ways that is popular inside the regime. it's also what his father did and grandfather did in terms of this nuclear program so it shows consistency and legitimacy. the regime itself needs sort of a bolstering of its legitimacy with regard to the north korean people and this was a big propaganda exercise, as we saw, and therefore, it's bolstering the regime at a critical time. >> and gordon, there's a big question, really, you've mentioned this, whether the

united states will ever really know what caused this seismic activity which leads you to wonder, does the united states have good enough or any intelligence in north korea? and why is it so poor? >> yeah. in 2013, which was the last test, we sent our sniffer planes up and down the coast of north korea for weeks. we were not able to determine what we wanted to find out, whether it was a lawsuit tone yes, ma'am bomb or uranium one. we still don't know. this detonation today was ten kilometers underground which means none of the radio activity will escape. therefore, we may suspect a lot and nonetheless we may not know because it's so far under the surface. >> congressman, i know that you know that very, very well sitting on the intelligence committee. the white house congressman has responded today said that it

will not accept a nuclear north korea. are we kind of past the point being able to decide that? what more can the united states do about it? >> that's the irony. the administration does not have it on its to-do list eliminating north korea as a threat. regardless of what this test might or might not have been, as you stated, and they certainly have missile technology that puts the united states within reach. there's a number of things the administration could be doing. we see this with north korea being a threat, also. they work with others so it's not just a danger to us but others. one thing that galvanized the international community to bolster our defense and, three, work on a coordinated basis with china to make sure that this issue is addressed with north korea. >> and even more sanctions, as undynamic as that may sound. gentlemen, thank you very much for your time. appreciate it as always. tom foreman is "outfront"

with us now. you've been looking at this issue very closely. why is it so important for kim jong-un to prove he can pull this off? how much of a game changer would it be? what are you finding out? >> if, kate, they actually have a hydrogen bomb, this would vault north korea immediately into the upper echelon of nuclear powers in the word. the united states, russia, france, china, great britain. when they are talking about their nuclear arsenal, they are talking about hydrogen bombs. not merely atomic bombs but hydrogen bombs. the atomic bomb relies on at tomorrows -- atoms breaking apart and also a lot of heat. that's why these are called thermal nuclear bombs. it's not as hard as the hydrogen bomb which is a two-stage explosion.

this shows a higher level of technical expertise. and the atom bomb, oddly enough, even though it's physically a big device normally, it presents a smaller blast in nuclear terms than the hydrogen bomb which can be made smaller and produce a bigger blast. so kate, this is the kind of thing that would be easier fitted onto a rocket that north korea has right now and launched at somebody else. >> hence why it is so dangerous and such a concern in the united states and beyond. so how big would the blast -- you say it's bigger. how big would the blast be from a hydrogen bomb? >> if we went back to the 1940s and looked at the two bombs dropped on japan at the end of world war ii, this would be the rough blast size of those bombs. look at the advancement since then. here's another nuclear blast. another atomic blast. but these, the last three here, these are hydrogen test blasters. look at the comparable size. it is absolutely massive out

there. the signature of this explosion only looked to the seismographs out there about the size of these things here. that's why they say we don't think of it as a hydrogen blast. but if they picked up some information that gets them closer to that, again, kate, you can see why the whole world is watching and concerned about this. >> that is a startling comparison when you line them up like that, tom. thank you so much. wow. "outfront" for us next, donald trump and ted cruz, the two gop front-runners both speaking to cnn tonight as there are new questions about ted cruz's citizenship. plus, donald trump repeatedly ducking responsibility about how long can he pass the buck? and melania trump in her first solo interview on why she's not out on the campaign trail. when my doctor told me i have age-related macular degeneration, amd we came up with a plan to help reduce my risk of progression. and everywhere i look...

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donald trump playing the birther card again, only this time it's against his surging competitor ted cruz. and tonight, the two front-runners are speaking to cnn about the heated debate over ted cruz's citizenship. dana bash is speaking to ted cruz this evening. trump has been raising concerns about cruz's citizenship, even suggesting cruz may have a canadian passport. questions he, again, raised with wolf blitzer. >> do you believe senator ted cruz is a natural-born citizen? >> i don't know, to be honest. and i like him a lot. and i don't like the issue. i don't like even bringing it up. and you know, it wasn't me that brought it up. it was "the washington post" doing an interview. one of the questions they asked me was this question and they

went with it and i wasn't very aggressive with the answer except one thing. you can't have somebody running if the democrats are going to at some point and one of them threatened to bring a suit a long time ago. how can you have a nominee running against a democrat, whoever it is, probably hillary clinton because she's escape the e-mail problem which is disgusting that she's able to because other people doing far less have had major consequences. it's been terrible. it's probably going to be hillary. how are you going to run against the democrat and this is hanging over your head. >> he said he's a natural-born citizen because his mother was born a u.s. citizen and as a result he's a natural-born citizen. >> i hope he's right. i don't want to win on this point. what the democrats are saying, though, is he had a passport. >> he says he didn't have a passport. >> i think that's wonderful if he didn't and i never understood

how he did but everybody told me had a joint passport. >> wolf, you asked the simple question, the question that he's avoided answers, simply, does he believe ted cruz? and he says he doesn't know. >> even though earlier he seemed to suggest this was not an issue. now apparently it is an issue and he told me in the interview that cruz can go to a federal judge and ask for a ruling and make sure the president of the united states get a ruling from a federal judge and everyone can move on. he's putting the onus, the burden on ted cruz to go to a judge. this is a specific recommendation that donald trump has made. >> specific recommendation that i highly doubt ted cruz is going to walk in to ask a judge to weigh in on this. who knows. it's been a wild race. we'll see what ted cruz says. you also made the point -- and we heard this already -- that donald trump critics, democrats,

can use this to their advantage. and you asked them about that. do you get any sense that this could all backfire on him? >> donald trump keeps saying that democratic lawmakers, congressmen will go to court to see -- the supreme court has never formally ruled on whether or not the definition of a natural-born citizen and so trump says, you know what, this is going to be around for years. if you don't resolve this quickly. he's raising questions out there just as he raised questions a few years ago about president obama, where he was born, his birth certificate. >> what did he say about that tonight? is he still talking about that? >> he still says he has a lot to say, he doesn't want to get into it and he'll let us know down the road. he has a whole book he wants to write. he doesn't want to get into the whole president obama birther issue. >> he has another birther issue to focus on now. thank you so much, wolf. a lot in that interview. wolf blitzer got it all. and ted cruz, is defending

himself against donald trump's comments tonight. here's what he told dana bash today. >> look, the legal issue is straightforward. the son of a u.s. citizen born abroad is a natural-born citizen. >> but it's never been tested. you know it full well because you've done it on other issues. >> listen, the constitutions on laws in the united states are very straightforward. the very first congress defined the child of a citizen were framers at the constitutional convention. at the end of the day, this is a nonissue. i tweeted a link to a video of fonzie jumping a shark. you know, i'm not going to engage in this and the reason is simple. there are far too many serious issues facing this country. last night, north korea claims to have tested a hydrogen bomb. what the american people are looking for is who is prepared to be commander in chief? who has the seriousness, who has the judgment, who has the knowledge, the clarity of

vision, the strength and resolve. >> let's button this up, though, just on the issue of passport. >> what passport? >> donald trump is suggesting, saying that you had a canadian passport. >> it's not true. >> false? never had a canadian passport? >> of course not. >> and you're sure, you asked your mother, your dad, you never had one? >> yes, i'm sure. >> dana bash is "outfront" in iowa. cruz's initial response was to make it a joke, make a joke about this, saying that trump had jumped a shark. but today he seems to be taking this much more seriously. >> reporter: well, look, i mean, obviously he's got to walk this fine line between taking it seriously and make sure that what donald trump is saying doesn't become so much a part of the narrative in this campaign right now that people he's on the ground trying to reach to convince to go out to caucus for him don't get second thoughts which, of course, is the whole reason that donald trump is throwing this out there saying to wolf, i don't know.

he might be. i'm just saying. we might have to take a look at it. and that's vintage donald trump. it's why he's a genius marketer and he's been translating that into politics for the last six months. on the other side, ted cruz, his strategy about donald trump, has really worked so far, which is to hug him as much as he can and when trump goes after him, try to make a joke about it. you're right that he feels like he needs to explain the law. he needs to explain the legal basis of his belief that he doesn't have a problem. but, you know, he's trying to do that without giving too much credence and taking the bait too much of what donald trump is trying to pull him into, kate. >> that seems a very difficult thing to do and he's trying very hard at it, dana. great to see you. thank you so much. >> thanks. jeff kaufman is the iowa republican party chair. thank you so much for coming in. you've been hearing this back and forth. you heard ted cruz saying this

is a nonissue. do you agree or do you think this is a legitimate question? >> look, the iowa caucuses are close to the people. there's going to be a lot of questions asked. let's face it, anybody who follows politics knows that this is a full contact sport. a lot of issues are going to come up. ultimately it's going to be iowa to decide which are those issues that are important or staying power through february 1st. >> are voters really talking about this? that's what donald trump says, raising questions about the eligibility to become president. >> i'll be honest, i've had but a handful talk to me about this particular issue. i have not heard a lot of talk or questions about the citizenship and senator cruz. >> so does this bid into the not a legitimate issue to bring up on the trail? >> well, i don't know if there are laj mate or nonlegitimate issues on the trail. look, the reason that iowa is a

caucus state and the first in the nation is because our people show up on that trail. our people are going to every community center. they are going to people's homes and to events and they are going to ask the questions that they are going to ask. i think the legitimacy of the questions are going to be determined by the answers that these individuals are going to give and ultimately i think iowans are going to be more concerned about bringing a retrend from the '90s that is going to be a failed policies from the obama administration. >> i wonder if you think donald trump is right in bringing this issue up, that it puts your party in a precarious position. because you publicly spoke out about donald trump or were seen as criticizing donald trump for crossing a line with his muslim ban proposal. do you think this crosses a line, then? >> okay, i'm a professor of history and i can tell you in studying all of the presidents, i have yet to find one that i

agree with 100% of the time. to critique and questions candidates, i think that's very healthy. the reason iowa is a caucus state, we're going to have these discussions and have these dialogues. ultimately, february 1st is going to determine who crossed the line and who didn't and ultimately on february 1st there's going to be a determination of which of these gentlemen and carly fiorina, each of those particular candidates are going to be best to start to undue the harm that's been done by barack obama in the last eight years. >> jeff kaufmann, thank you so much. >> thank you for having me. >> of course. "outfront" for us next, melania trump in a revealing new interview, why she hasn't been by her husband's side. could she be america's next first lady? and donald trump's m.o. >> there's this doubt. people have doubt.

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tonight, the war of words between donald trump and ted cruz is heating up over cruz's canadian birth. trump says, don't blame him since others are raising the issue. >> you know, it wasn't me that brought it up. it was "the washington post" doing an interview. >> they asked you a question? >> and one of the questions they asked me was this question and they went with it and i wasn't very aggressive with the answer except one thing. you can't have somebody running if the democrats are going to at some point -- and one of them threatened to bring a suit a long time ago.

>> but is this just the latest case of donald trump saying don't shoot the messenger? sunlen serfaty is "outfront." >> i like him a lot. i don't like the issue or bringing it up. >> reporter: it's become a fundamental play in donald trump's playbook, casting himself as just the bearer of bad news. >> there's this doubt. people have doubt. again, this was not my suggestion. i didn't bring this up. >> reporter: dredging up things he's heard, pushing them out into the political ether. and when pressed to substantiate the claims he's repeated, his defense, don't shoot the messenger. it's a crutch trump has leaned on repeatedly and politically opportune times, bringing up old charges about bill clinton tweeting "the former president was once called a racist but the proof of that claim he didn't have." >> are you yourself calling him a racist? >> no. he was called that by the obama

campaign. he was extremely insulted. >> why did it you put it in your tweet if you don't believe it? >> i didn't say it. they said it. >> reporter: and saying that president obama wants to take away america's guns. >> the president is thinking about signing an executive order where he wants to take your guns away. but when pressed -- >> i heard that he wants to. somebody said in the press what he's thinking about. i didn't say he signed it. i think it will be a tough one to sign, actually. >> reporter: and on immigration, trump repeated what he had heard about the number of people who were in the u.s. illegally. >> i'm now hearing it's 30 million and could even be 34 million, which is a much bigger problem. >> reporter: a number three times larger than current estimates. >> where are you hearing that from? >> from other people and i've seen it written in various newspapers. >> reporter: and making big claims like this is nothing completely new for political candidates but certainly it's become a key part of donald

trump's strategy where he's able to capitalize off the payoff of the rhetoric but also at the same time, kate, really distancing himself from the core parts of the facts in the original claim. kate? >> sunlen serfaty, thank you. now, katrina pierson and amanda carpenter. guys, it's great to see you. >> hello. >> you just heard donald trump say over and over again it is not him bringing this up. it is other people. but why not take ted cruz at his word? >> well, i think the only reason we're talking about this right now, kate, is because senator cruz responded to a report that donald trump brought this up to begin with in which he did not and donald trump is not the only one that has those concerns now that the question has been asked. it's been republicans. and amanda knows this. donald trump does take senator cruz on his word, as you just

heard on "wolf" today. he hopes it's not going to be an issue. however, there are democrats out there talking about this issue. >> but he didn't say -- his specific answer to wolf, when wolf asked him if he believed that ted cruz was a natural-born citizen, he said, i don't know. >> well, exactly. he's not a supreme court justice. people have asked for there to be a ruling on this. donald trump doesn't know. he says he wants to believe him and take him on his word. he hopes this does not come up. i'm not quite sure how this is translating that donald trump doesn't believe ted cruz. >> amanda, is that enough for you? >> listen, what the donald is saying is that donald is trying to help ted cruz? >> what i'm saying is that he's a master -- >> go ahead, amanda. >> he's a master of media. he knows controversy. when ted cruz and trump appeared at a rally last september, donald trump was also asked about ted cruz's citizenship and said the lawyers have looked at it and he understands that ted

is in fine shape. the only thing that has changed is ted cruz has gone up in the polls and he'll find a way to attack ted cruz once somebody starts gaining on him. i don't think donald trump actually knows how to attack ted cruz. i think that's how he's kind of playing footsie. he was criticizing him on the ethanol subject and saying he should have made more friends in washington and questioning evangelical faith of ted cruz. donald trump is all over the place. given the fact that cruz has tried to smother him with kindness, he doesn't know what to do. he's had a tested way to get media attention with the birther theory in the 2008 election against president obama. >> amanda, do you personally think ted cruz is natural-important citizen? >> i have always said i have no question. i have no reason to believe he's not. but it's not my responsibility to go out there and improve that issue.

but to amanda's point, mr. trump doesn't need a reason to bring something up. if he wants to go after senator cruz, he can. he doesn't have to hide behind a reporter or make something up. and that's really what is at hand here. because we have this media line essentially saying that donald trump is attacking ted cruz when that is in fact not what happened. he is saying he believes ted cruz and he hopes it's not going to be a problem but because this is coming up and it is coming up on the campaign trail among the people in iowa and elsewhere, why not just put it to bed? >> katrina, politico and "the daily beast" are reporting this afternoon -- and you say you have no reason not to believe him but you have previously said -- told people to stop talking about it. so not even to bring up this issue specifically. this is a facebook post, politico and daily beast are reporting from you, ted cruz is a natural citizen by birth and is eligible to be president. for those constantly citing otherwise is plain whiney and

the most unintelligent way to prop up your choice. >> which is exactly right. if your parent -- your mother is a citizen, then you are a citizen. that's what the scholars are saying and that's why everyone is saying, if that's the case, just go get a legal statement. it has not been tested in the courts. that's the only concern here, is whether or not hillary clinton, who will stop at nothing to win this presidency, if she would or wouldn't challenge that in the courts. and i don't think anybody can say that right now. amanda, are you willing to say that hillary clinton is not going to challenge senator cruz's status? >> to katrina's point, trump has said to wolf, ted cruz should go to a judge or court and have this adjudicated and decided. do you think ted cruz will take that advice? >> no, i don't think ted cruz needs to take legal advice from donald trump. there are plenty of lawyers already on the site. if people have questions about this, the best resource to go to is a legal article written in the harvard law review by a

former solicitor general from president bush and obama, a bipartisan article and they agree that there's no question he's a u.s. citizen. so that's readily available online. maybe donald trump should read it. it seems like he did read it in the past four months ago when cruz wasn't gaining in the polls and that's available for anyone to go look at. bottom line, ted cruz says this is a distraction. katrina, do you think people should stop talking about this? >> like i said, the only reason we're talking about this today is because senator cruz responded to the media saying donald trump brought this up when in fact he didn't. >> so i guess what we've got is, we don't know. we're going to keep talking about it. guys, we'll see where this goes next. thanks very much, katrina. amanda, thanks very much. "outfront" next, melania trump speaks out on family politics, former first ladies and why she's not come paining with her husband. and an "outfront" investigation. do more guns make america safer? we'll be right back.

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>> reporter: when it comes to being in the spotlight, melania trump is a woman at ease. but the 45-year-old former model tell's harper's bazaar magazine, when it comes to her husband, republican front-runner donald trump, she is more than happy to stay behind the scenes. they say i'm shy. i am not shy. i'm choosing not to go political and public because that is my husband. i've very political in private life and between me and my husband, i know everything that is going on. i follow from a to z. she made a rare campaign stop with him in south carolina last october. >> he will be the best president ever! >> reporter: and told the magazine she was in on the decision to run for president. we decided as a family it was something that we would do. i explained it to my son a lot. i said, daddy will run for president. melania doesn't have a nanny for her 9-year-old son barron which is one of the reasons she stays

away from the campaign trail. they visited trump at his new york office in 2010 in this video. they have stood by him during some of his biggest moments. but their time in the spotlight has led some to make fun of their lavish lifestyle. >> because the white house, it's the smallest place donald and i have ever lived. >> reporter: melania tells the magazine, the family often laughs about it. >> wouldn't she be a great first lady? >> this message paid for by the melania for first lady foundation. >> reporter: it's kind of an honor to have somebody play you like that in a fun way. it was modeling that brought melania from slovenia to the united states. she applied for a green card in 2001. citizenship took time. it never crossed my mind to stay here without powers. you follow the rules, you follow the law. she formed her own skincare selection and a jewelry line called melania.

>> i'm designing for women across the country. >> reporter: accomplishments donald trump tells wolf blitzer he is incredibly proud of. >> she's very smart and, you know, she made a tremendous amount of money. she was a very, very successful person as a model and i think she's going to be a fantastic first lady if it ever comes to that. >> reporter: as for melania's former first lady, she won't comment but that jackie onassis had a simple but feminine style. melania's friends describe her as having calmness, serenity, boldness and gracefulness. kate, she said she's taught her little boy to speak slovenian as well as italian and french. >> and donald trump does not. he only speaks english? >> exactly. >> thanks so much, jean. appreciate it. fascinating look. "outfront" next, david gergen. it's great to see you.

so spouses, they are an important asset on the campaign trail. why do you think the trump campaign is not using melania more? >> well, some people think that he's hiding her, that he's uncomfortable to have her out there. i don't think that's the case at all. i sense that he's very shrewdly waiting for a moment when he's going to -- she'll become much more visible than she is now. and it will be something fresh in the campaign. i think he feels he's going to get the nomination on his own but he's going to need her in the general election. don't you think, kate, there's already the possibility that he's trying to set melania versus bill clinton? people will say, i'd much rather have bill clinton but a lot of people say, you know, melania is interesting. she's sort of gorgeous. and think about this. without any real interviews,

she's being compared to nancy reagan, a stunning model in france married to the president and to jacqueline kennedy, jackie onassis. she's already come a long way. i think she's going to be an asset. if you put her together with ivanka, his daughter by one of the earlier marriages, what you have is perhaps the beginning of his rebuttal to the whole idea i'm a sexist. look the women around me. they are smart, intelligent, well educated. >> fascinating. do you think she could keep this up staying in the background as first lady? >> no. i think she'll have to come out a great deal more in the campaign. she'll have to come and do a cnn interview, a real sit-down and she'll have to do the barbara walter's show again and other shows she'll do eventually. but as first lady, i wouldn't be surprised if she could in fact

be a bit more in the background. there are different models for being first lady and as much as people admire, for example, michelle obama or hillary clinton when she was first lady, she -- melania would be a very different model and i think a lot of people would relate to her. >> we will see. we're definitely not there yet. >> we will see. yeah. absolutely. >> david, good to see you. thank you so much. >> take care. "outfront" for us next, as the gun debate rages on, the questions americans are asking, would more guns make the country safer? we're going to take you inside an active shooting situation. how hard is it to take down a gunman? and jeanne moos with marco rubio putting high-heeled boots on the ground. i'm here at my house, on thanksgiving day and i have a massive heart attack right in my driveway. the doctor put me on a bayer aspirin regimen. be sure to talk to your doctor before you begin an aspirin regimen.

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elementary to name a few. that's a nine millimeters, a popular handgun used in san bernardino and many other shootings. advance law enforcement rapid response training trains law enforcement agencies nationwide in handling active shooters. it runs the largest training center in the country. the go-to organization for agencies nationwide in preparing for mass casualty and specialized emergencies. >> that's body armor. that's standard body armor my patrol officers wear. >> the guns firing rounds. i was the good guy legally carrying a concealed weapon when a shooting breaks out. i hear shooting down a long dimly lit hallway. i take a peak and shoot my own producer hitting him once in the chest. as i move down the hallway, another student pops out. i don't shoot him and am able to

stop the gunman. >> we hear the shots. we know the problem is down here. i pushed you, let's go, let's go because again, if we come to stop the act tifz shooter, we got to get to the active shooter. >> reporter: from 2000 to 2013 there were 160 active shooter incidents in 40 of the 50 states, rural and urban areas. in the first seven years there was six incidents each year and the frequency increased sharply doubling to roughly 16 incidents every year. pete blare who runs alert authored that report. he says active shooter situations are so chaotic in only a tiny number of incidents did someone with a gun stop a shooter. >> out of all of the events, it was 3% somebody with a firearm stopped the shooter. >> reporter: in 2014 a pennsylvania doctor shot and killed a gunman that killed one person and in 2008 a man with a concealed weapon stopped a gunman in nevada after the

gunman had killed two people and injured two others. >> i'm not anti gun at all. i have a concealed handgun license me self- >> reporter: but in an active shooter situation, you wouldn't want just anyone pulling out a gun to save the day. >> there is a lot that goes into it. looking at the situation and saying what's happening right now? >> reporter: alert emphasizes a good guy with a gun could kill innocent people. they could be shot by police or other civilians mistaking them for the attacker. or -- >> pause for sake. now we have a malfunction. >> reporter: three times the .9 millimeter jammed while i was firing it and that was practice. >> you have to strip the magazine out, work it like this, reinsert the magazine and then you can shoot again. >> reporter: without hundreds or thousands of hours of training, a rookie mistake like a jammed weapon, just a few seconds to

clear it could mean a good guy with a gun becomes another victim. miguel marquez, cnn, san marcos, texas. >> miguel, thanks. tomorrow night at 8:00. anderson cooper hosts a town hall with president obama on guns. i'll anchor "outfront" from there, as well. >> jeanne moos on marco rubio's boots. we have over 15,000 activities that you can book on our app to make sure your little animal, enjoys her first trip to the kingdom. expedia, technology connecting you to what matters. introducing centrum vitamints. a brand new multivitamin you enjoy like a mint. with a full spectrum of essential nutrients... surprisingly smooth, refreshingly cool. i see you found the vitamints.

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marco rubio's high heeled boots fashioned forward or fashioned faux pas? is jeanne moos. >> reporter: marco rubio may say. >> this is the most important election. >> reporter: it's what he wore on his feet that has the press poking fun. a vote for marco rubio is a vote for men's high heeled booties tweeted ted cruz' communications director linking to a new york magazine article can the headline, man heels, one reporter called them. >> there they are. >> look at that. >> no, no, no, he didn't. >> this is beyond -- this is austin powers, baby. ♪ ♪ >> they are sha glicious.

>> reporter: if it wasn't austin power, it was harry styles from one direction inspiring rubio c comparisons. when harry wears his, girls squeal. the heels ad may be two inches to the 5'10" rubio. reporters tried to figure out which designer booties he was wearing until the rubio campaign said they were from perhaps the duke. this duke dress boot will unleash the kingly appearance for $135. fellow candidate carly fiorina flaunted her higher heeled boots tweeting, yeah, at marco rubio but can you work these? and rand paul rubbed it in. >> we saw marco rubio had those

cute new boots and we wonder if we need new shoes. >> reporter: these two seem mismatched by senator rubio's boots are made for walking and for those we snicker. ♪ are you ready ♪ start jeanne moos, cnn, new york. good evening. thanks for joining us. busy night indeed. donald trump has been making insenuations about ted cruz' citizen ship and denying responsibility saying he is only asking what others are asking him. senator cruz was born in alberta to an american mother and trump's thoughts surfaced when he was asked about it late yesterday by "the washington post" and spoke today "the situation room's" wolf blitzer. >> senator ted cruz is your main rival in iowa according to the polls right now. all of a sudden, this issue of the fact he was born in canada has come up whe o