And for every family who never imagined that their loved one would be taken from our lives by a bullet from a gun. Every time i think about those kids, it gets me mad. Reporter those children, the victims of sandy hook, and behind the president today, families of victims from countless shooting rampages. He remembers them all and the daily carnage, as well. And by the way, it happens on the streets of chicago every day. Reporter when the tear was coming down his face and what did you think when you saw that . I thought that was authentic. I think he has met his fair share of survivors like us. Reporter but his tears drawing fire, too. Executive action on his own. Narrowing the loophole that allows weapons to be bought without a background check at gun shows and online. Hiring more agents to conduct background checks, and asking congress for 500 million to pride better access to Mental Health services. Determined. The National Rifle association issued a statement, saying, the proposals would not have events he mentioned. And gop president ial candidates were denouncing the president s actions. President obamas executive actions limiting gun rights will restrict our law abiding citizens. These orders today, i believe, are not worth the paper they are written on. If there is an issue related to federal gun laws, you ought to go to congress and try to forge consensus to make it happen. And Pierre Thomas with us now live from the white house tonight. And pierre, we mentioned that poll number, showing 85 of americans want more background checks, but there is also this tonight. Look at this chart. Gun sales spiking after president obama was first elected. A mass shooting. So, pierre, it is clear that many argue that guns are not the problem here. Reporter thats right, david. After the San Bernardino terror attacks, the fbi saw a Record Number of people attempt to buy guns. Pierre thomas on the story all day. Pierre, thank you. We turn now to a headline breaking late today from the fbi now, a new plea tonight, as they investigation that terror attack in San Bernardino. They are laser focused on that couple turned killers, but tonight, they have revealed there is an 18minute mystery. And that window of time could provide crucial clues. Abcs chief investigative correspondent brian ross now. Reporter the fbi knows when the attack began and almost everything until it ended, when the husband and wife terrorists, sigh yesterday syed farook and tashfeen malik, were shot dead in their black suv. But in between officials said mystery, an accounted gap in their whereabouts not detected by Traffic Cameras or witnesses. We can account for three hours and 42 minutes of their time. We are missing 18 minutes of their time. Reporter and the fbi today made a plea for the publics help to solve the mystery, showing pictures of their vehicle. We want to ensure that if they made contact with anyone that we dont already know about that were able to fully investigate those matters. Reporter and the fbi also wants to know what happened to the hard drive removed from the killers computer at their home, the morning of the attack. The two were tracked to this San Bernardino lake around 11 45 a. M. By the fbi, but a search by divers did not turn up the hard drive or any other evidence. And brian ross with us now. And brian, you were telling us, that window of time is so important, because it could uncover their digital trail . Reporter thats right, david. Authorities believe the killer couple may have ditched the hard drive during that gap in time, which could reveal other possible targets and others who may have helped them either in this country or overseas, david. All right, brian ross with brian, thank you. We turn overseas tonight, and to afghanistan. There is word from the pentagon, one u. S. Service member has been killed and two were injured during a firefight with the taliban. One medevac helicopter landing amid incoming fire was grounded after being severely damaged. All three americans, members of the u. S. Special operations forces. Afghanistan, of course, a major issue in the race for 2016, and tonight, new words from one frontrunner aimed at another. Donald trump doubling down on bill clinton, arguing his past is fair game for hillary clinton. Trump indicating theres one question hed like bill clinton to answer. All of this comes as trump makes headlines overseas tonight, after his proposed ban on mud limbs coming to america, word the uk will debate a ban on trump . Abcs tom llamas, on the campaign trail in iowa. Reporter for donald trump it is now, quote, open season, on bill clinton and his sex he was impeached. He wasnt allowed to practice law. Hes settled for a tremendous amount of money. I mean, you know, theres things going on there. Reporter just listen to trumps answer when asked if theres a difference between bill clinton and bill cosby, whos been accused of rape by dozens of women. Youd almost have to ask bill clinton that problem, that question. It would be a very interesting question to someday ask him. Certainly, he has a lot of very strong charges against him, and its pretty bad stuff. Reporter trump says the clintons started it when hillary called him sexist. Im going to let him live in his alternative reality and im not going to respond. Hillary clinton. Reporter but today there was no mistaking her target we should not reward people who use inflammatory rhetoric, who use the kind of derogatory comments, whether its about muslims or mexicans or women or people with disabilities, whoever it might be. Reporter but as trump mocks the clip clintons lets say hillary is the president. Ah. Reporter the trump team now doing some damage control over their First Campaign ad. Hell stop illegal immigration by building a wall on our southern border that reporter we now know the people running in that video nowhere near our southern border. Instead, they were 5,000 miles away in morocco. Its a display of what our country is going to look like. Rar however, this morning, mistake. Yeah, im going to have a conversation with whoever made the mistake. Reporter but tonight, that that longtime trump staffer eating his words, saying the after all. And tom llamas is live from the campaign trail in iowa. And tom, were hearing tonight, the British Parliament will soon debate a proposal involving donald trump . Reporter thats right, david. That proposal involves banning donald trump from coming into the uk. Now, it will largely be symbolic, but tonight, trump firing back, saying that if hes banned from coming into the uk, hes going to withhold more than 1 billion in investments in his golf courses in scotland. David . Tom llamas live in iowa. Tom, thank you. Meanwhile, less than 24 hours after we saw former the campaign trail, trying to seal the deal in New Hampshire for his wife, tonight, Bernie Sanders, who holding a slim lead there, has come out with a tough new message for wall street. Quote, greed is not good, saying its time to blow up the banks that are too big to fail. Abcs cecilia vega, oneonone with sanders tonight, as a crowd of his supporters grew right behind them. We need to have the another democrat in the white house. Reporter hill little clinton now enlisting the big dog of democratic politics, her most powerful weapon, on the campaign trail. But there is one man standing in their way. Secretary clinton is wrong. Reporter senator Bernie Sanders, the democratic socialist from vermont, drawing those massive crowds. And twice as many donors as president obama had at this stage in 2008. Also beating clinton in the polls in his own backyard, New Hampshire. Today in new york, sanders bringing his fight against wall streets front door. If a bank is too big to fail, it is too big to exist. Reporter sanders today pledging to dismantle the nations biggest banks and Financial Firms within the first year in office. We met up with the senator. Hey thank you. Reporter the mob of supporters there every step of the way. You sound like you despise Corporate America, you sounded angry. What what i despise is the greed, is the contempt. Reporter so i asked about that pledge to break up those banks deemed too big to fail. A lot of people are going to hear this promise for you today and say, there is no way, it hasnt been done before, this sounds like an electionyear promise. How can you really do this . When enough people demand change, we get change. That is the history of america. That is the history of the civil rights movement, of the womens movement, of the gay movement, of any movement thats brought about change. Reporter that blunt talk a will Corporate America love a president sanders . No, i think they wont. Reporter the question now will these crowds turn into votes. If you dont win in New Hampshire, does this spell the end of the Bernie Sanders campaign . Absolutely not. Were in this in the end. But are they concerned about bill clinton campaigning there, trying to shore uphillry clinton, who is behind . Reporter the sanders team says they expected bill clinton to be on the trail. They say, they know they are the underdog in this race, but you heard sanders say it right there. They plan to win New Hampshire, they think they can win iowa. They are not going away any time soon. All right, cecilia, thank you. We turn now to the extreme weather tonight. The big chill in the east. A Conveyor Belt of storms slamming the west tonight. In santa barbara, take a look at this. Drenching rain. A dangerous commute on highway 101. Further north in spokane, washington, a united flight skidding off the icy taxiway, landing in snow. A real scare for passengers. And meteorologist rob marciano reporter scary moment at spokane airport a united flight bound for denver with 166 passengers on board, skidding off an ice is taxiway, right into the snow. As we were turning to take off, kind of just went side the ways. Reporter passengers tweeting photos from the plane, thankfully, no injuries. Its part of the same el ninofueled system thats slamming the west. From the flooded bay area, to van nuys, this man forced to climb out of his car, above the rushing waters. In areas burned by wildfires, residents are shoring up homes in case of mudslides. Abcs Indra Petersons is in izuza, california. This homeowner has boarded up the side of his home. Hoping this time with another storm on the way, this house will be saved. Reporter meanwhile, in the east, after a recordbreaking warm december, a sudden burst of the coldest estest air so far this winter. Even derailing this train near boston. And taking this new yorkers breath away. I was shocked. Reporter that cold air over the warm Atlantic Ocean even bringing snow to the outer banks of north carolina. And rob marciano with us now, in a frigid commute home here in the northeast. Hes in new york city tonight. Rob, how long does this last . Reporter luckily, its going to be shortlived, david. Its been such a warms winter, it does kind of shock the system. Look at the temperatures tonight. The wind chills are going to be well bell low freezing in many sports. 11 in boston, 6 in burlington. 17 in chicago and 22 degrees, its what it will feel like later on tonight, all the way down to atlanta. We go to the west, where the damage is being done. Three more that will come in. Lets time out the next one. Very similar today. Hits San Francisco first in the morning, then spreads down to los angeles. And well see similar amounts, maybe lower snow levels, but three to five inches, with several more waves coming in. So, flash flooding, debris flows are going to be an issue. They do need the rain, but too much too soon is a problem. Rob marciano with us live there are major developments this evening on the mother and son who became international fugitives, fleeing to mexico before that dramatic takedown. Ethan couch is still in mexico tonight, his mother is back here in the u. S. And appearing in court today. Headed back to texas now, as we learned stunning new details about their final days of freedom. Abcs matt gutman in mexico on where they were together. Reporter when ethan couch visited this mexican strip club last month, sources tell abc news tonight he brought someone with him. His mother. Staff at the harem strip club say that the 18yearold affluenza teen two seeded to order beer after beer. And when his mother left, he stayed for lap dances in the v. I. P. Room. Ultimately wracking up a 1,000 bill. When he couldnt pay it, sources say a waiter brought him to this resort, where his mother also didnt have the cash. He left his rolex as collateral. Hes now in this mexican detention center. His lawyer meeting him for the everythings okay. Reporter his mother, whisked to the u. S. Today, in a los angeles courtroom, waving her right to fight extradition to texas. Politely answering the judges questions. Yes, i do. Our biggest concern is that this has become less about the law, whether she broke the law and more about retribution. Reporter tonyas Attorney Says her client has broken no texas law. Its been a hard fall for the suburban mom. She hasntnt be been allowed to change her clothes since she was taken from mexico on wednesday. Her attorney tells me she will likely remain in jail once in texas, because she wont be able to make that Million Dollar bail. David . Matt gutman in mexico for us again tonight. Thanks, mat mat. There is still much more ahead on world news tonight this tuesday. Armed and dangerous. Watch this. The female jewel thief striking again. Now wanted for six robberyies across five states. The new surveillance just released coming up here. Headline involving bill cosbys wife. The new turn in the case. And, the powerball jackpot, now hering record territory. And we ask two important questions for you tonight. Does the quick pick better your chances of winning . And which state has the most winners . Time to hit the road. Rower i used to be. I even accept i have a higher risk of stroke due to afib, a type of irregular heartbeat not caused by a heart valve problem. But i wont accept is getting out there with less than my best. So if i can go for Something Better than warfarin, i will. Eliquis. Eliquis reduced the risk of stroke better than warfarin, plus it had significantly less major bleeding than warfarin. Eliquis had both. That really mattered to me. Dont stop taking eliquis unless your doctor tells you to, as stopping increases your risk of having a stroke. Eliquis can cause serious and in rare cases fatal bleeding. Dont take eliquis if you have an artificial heart valve or abnormal bleeding. And it may take longer than usual for any bleeding to stop. Seek immediate medical care for sudden signs of bleeding, like unusual bruising. Eliquis may increase your bleeding risk if you take certain medicines. Tell your doctor about all planned medical or dental procedures. I accept i dont have to set records. But im still going for my personal best. And for eliquis. Reduced risk of stroke plus less major bleeding. Ask your doctor if switching to eliquis is right for you. You totaled your brand new car. Nobodys hurt, but there will still be pain. It comes when your Insurance Company says theyll only pay three quarters of what it takes to replace it. What are you supposed to do . Drive three quarters of a car . Now if you had Liberty Mutual new car replacement, youd get your whole car back. I guess they dont want you driving around on three wheels. Smart. With Liberty Mutual new car replacement, well replace the full value of your car. See Car Insurance in a whole new light. Were going to text next tonight to the woman wanted for six robberies in five states. Armed and striking again in the last 24 hours. Heres abcs steve osunsami. Reporter police say shes armed and dangerous. The young woman with a gun and a fivefinger discount, seen here on monday, allegedly robbing her sixth Jewelry Store in the last several months. This one in north carolina. Tonight, state and federal authorities are releasing they say is her biggest robbery of all, in panama city, florida, on august 10th. Authorities say she made off with nearly 400 grand in jewels. They say her m. O. Is always the same. That she likes to take down Outlet Stores where she ties up the salespeople at gunpoint, and then steals watches and diamonds, wearing gloves to prevent fingerprints. The day before, in florida, police say this is her, in the same store, casing the joint. Seen here wearing a black dress and looking directly into surveillance cameras. Shes also accused of robbing stores in georgia, South Carolina and this one in tennessee on october 16th. The fbi says shes probably getting help from this man, seen with her in images from the first two robberies in georgia. Theres definitely accomplices. Theyre going to do it again and theyre going to get caught. Reporter tonight, a u. S. Jewelry store Security Association is offering a 1,000 reward, hoping someone might turn this young woman in. David . Steve, always great to have you with us. Thank you. When we come back here tonight, what are the fans going the three nfl teams that want to move to l. A. . Also tonight, the new development involving bill cosbys wife. And america strong tonight. That little flash of purple right there in this video. Shes a little girl, about to be saved. What had just happened to her, coming up. Is it run by robots . No no, you can talk to a person anytime. cause i dont trust robots. Right. Well, if the portfolio youre invested in doesnt perform well for two consecutive quarters, amerivest will reimburse your advisory fees for those quarters. I wasnt born yesterday. Well, actually it looks like you were born yesterday. Happy belated birthday. Thanks. For all the confidence you need fact. Advil pain relievers are used by more households than any other leading brand. To treat their aches and pains more people reach for advil. Relief doesnt get any better