Investigation. But thats exactly what director comey did today. He call this is a very unusual circumstance. Today fbi director james comey dismissed President Trumps twitter claims that president obama had trump tower wiretapped. I have no information that supports those tweets. President obama could not unilaterally order a wiretap of anyone . No president could. Reporter speaking before the house intelligence committee, director comey took an unusual step, confirming the fbi is investigating russian involvement in the 2016 election. That includes investigating the nature of any links between individuals associated with the Trump Campaign and the russian the government and whether there was any coordination between the campaign and russias efforts. Reporter before the hearing, the president tried to undercut those allegations on twitter, writing, democrats made up a pushed the russian story as an excuse for running a terrible campaign. This afternoon, the white house stood its ground. You can couldnt ntinue to l something. But continuing to look for something that doesnt exist doesnt matter. Reporter also ongoing Intelligence Leaks of classified information, an issue the president has repeatedly said should be investigated and one comey addressed head on. This behavior can be deterred. Its deterred by locking some people up. Reporter an investigation into leaks, russia, the Trump Campaign and how they all fit together. The chairman closed that hearing by asking the fbi director, look, if you do have any evidence of anyone in the house coordinating with russia or if you dont have any evidence, either way, please let the committee know quickly. A the issues that came up during the hearing. Comments from former director of national intelligence, james clapper. He retired in january when President Trump took office. Clapper appeared on meet the press on march 5th and told chuck todd he was not aware of any evidence of improper contact between the Trump Campaign and russian officials. Theres no evidence of collusion between the russians and the Trump Campaign . Mr. King, its not something i can comment on. Mr. Clapper then went onto say that to his knowledge, there was no evidence of collusion between members of the Trump Campaign and the russians. I know that youre not going to tell me whether or not you have any evidence. But i can tell you we dont have any evidence. James clapper took the unusual step during the hearing of releasing a statement that said while he was not aware of any conclusive evidence, he could not account for evidence that may have been gathered since the inauguration on january 20th. Of our nbc washington flash survey tonight. We wanted to know where you worried that russia may have hacked our election . So far, most of you say youre either more concerned or you were already concerned. Tell us what you think on the nbc washington facebook page. While that house hearing was underway, Supreme Court nominee neil gorsuch was on the senate side of the hill for his first day of confirmation hearings. He told the Judiciary Committee he would follow the koconstitutn in the manner of the late antonin scalia. He reminded us that words matter, that the judges job is to follow the words that are in the law, not replace them with words that arent. Justice scalia died 13 months ago. Senate republicans refused to allow former president obama to choose a replacement. His nominee never got a hearing. The gorsuch hearings will last most ofhi senate will vote on the nomination in early april. Now to a story that sent panic across washington about a year ago. The man who sparked a shooting at the Capitol Visitors Center has a hearing. Lets start with pat colins with the latest on that incident last year at the capitol and reaction from the suspects family. Reporter doreen, larry dawson sentenced to about a year in that shooting incident at the capitol. He could be eligible for supervised release later this spring. His sister says hes remorseful about what happened. He understands the seriousness of what has happened and hes sorry. I know from this day forward hes going to be a better man. Reporter thats pamela ro e court today for the sentencing of her brother larry dawson. Dawson was involved in a shooting incident at the capitol a year ago. It resulted in a lot of panic and fear and chaos. Dawson pulled out a gun at a security checkpoint, aimed it an an officer. When he didnt drop it, the officer fired off a number of shots. Dawson was wounded and taken to the hospital for treatment. Hes been diagnosed as suffering from schizophrenia and delusions. You realize and he realizes now he Needs Mental Health treatment, is that right . Yes. Reporter turns out dawsons gun was a bb pistol. Turns out hed been at the capitol before protesting in support of the 15 minimum wage. He claimed to be a prophet of god. He claimed god was telling him what to do. In october 2015, dawson was outburst inside the capitol. But then five months later on that march day, dawson returned. It got violent. Larry Russell Dawson in custody ever since where hes been treated for Mental Health issues. Now dawson says he just wants to go back to tennessee to be with his family. He says he never ever wants to come to d. C. Again. There are also new concerns about security at the white house after two high profile arrests over the weekend. Shawn keon is accused of stealing a car in roanoke, driving into a white house checkpoint on saturday and saying he had a trunk. He claimed he had an appointment with President Trump and told them the bomb was really an asteroid. Keon was in the navy for six years. He was an Aviation Electronics technician and left the as much as service back in 2014. William raulerson was on the north side of the white house and got between the fence and the security barrier. He was shouting nonsensical statements. Secret Service Officials are discussing that First White HouseSecurity Breach since President Trump took office. Scott macfarland is following the developments are from the newsroom. Weve learned that meeting is happening right now inside a private secured Capitol Office space. They want to have answers to what happened when that 16minut occurred at the white house march 10th during which a california man made it all the way to the south lawn before he was stopped. The committee has ordered secret service to bring its security logs and surveillance. Committee records show that was one of at least 144 beaches of Us Secret Service controlled facilities since 2005. As for that california man, jonathan tran, weve learned hes scheduled to be back in court next month, facing ten years in prison a federal charge, accused of not only jumping the fence but of carrying two cans of mace with him. Tran is now home staying with family, wearing a gps device under court order. Filings from prosecutors show tran must also undergo a Health Evaluation and is banned from going back near the white house. According to agency records, the secret Service Official has told federal planners last month the fence as it stands now is inefficient and base and raise the fence itself. Theyll use spikes or other anticlimb features. Whats more, weve learned from the u. S. Secret service there is no firm date yet for completion. A teacher jumped into action after a stabbing outside a high school in Prince Georges County today. The student was stabbed during masonry class. Looks like hes going to be okay. Bureau chief Tracee Wilkins is in temple hills with a look at how that teacher stopped things from getting worse. Reporter in this video of a school fight, it appears one of the students has a knife. Once i saw the video of the fight i came back and talked to security. Reporter this video was taken inside of Crossland High School at the beginning of the school year. Her daughter was one of the people involved in this fight. It doesnt appear anyone was stabbed or seriously injured. But with todays concerned about knives and security. Unfortunately there was a stabbing here this morning outside of the school. It could happen on the inside of any of these schools at any given time. Reporter today a student was stabbed while walking in front of the school with his masonry class preparing to fix this wall on School Grounds when the principal says he made eye contact with the suspect who is 18yearold nathaniel coats. Did not like the way a student looked at him and he stabbed him. Reporter a teacher quickly stepped in. The teacher was present. There was always an adult present with the kids. He tackled the young man that stabbed the young man and was able to get security out right away to arrest the young man. Reporter this teacher was a hero to jump on top of this guy with a knife. Public schoabsolutely. Reporter the sergeant took coats into custody and turned him over to Prince Georges County police. Expected to be okay. He was stabbed one time. So he was taken to the hospital to make sure there were no further injuries as a result of him being stabbed. Reporter the principal says she and her staff are planning to make a statement against the violence. Our campaign, no more violence. One school, one community and one county at a time. Reporter we asked Prince Georges County schools for statistics for violence within the school involving knives. Those numbers were not available by our air time here. Now, coats is looking at a felony charge for first degree assault. Was it an accident or something more sinister . The new details emerging after a home goes up in flames hours before it was set to be auctioned off. You see them on facebook, the faces of the missing. How Community Leaders are coming together to give a teenagers who have vanished. Reporter im adam tuss. Huge changes are planned for Reagan National airport. It could definitely affect the way you get around. Ill show you some of the details next. And weather having a big impact on your week here. We go up and down big time. Ill show you thweather foe re for years, fios has been promising fast internet to Small Businesses. But for many businesses, its out of reach. Why promise something you cant deliver . Comcast business is different. We deliver superfast internet with speeds of 150 megabits per second across our entire network, to more companies, in more locations, than fios. We do business where you do business. Its been getting a lot of attention on social media lately, but it often ends there. Tonight Community Leaders are trying to shine a light on a series of missing person cases involving young girls in d. C. Darcy spencer is in northwest with their message and the response from police. Reporter these Community Leaders want to make sure enough is being done to bring these Children Home safely. Now, police are telling us that there has not been an increase in the number of missing kids. But these cases are getting more publicity. An interactive map put together by the news4 digital team shows where more than a dozen teens are missing from d. C. And information about each case. Community and faith leaders point out theres a common theme here. Many of the missing are young girls of color. We know that these girls are missing are black and brown girls. We know they are girls of color. We are also aware that when girls in other communities go missing, their names become household names. Reporter those leaders gathered today to bring attention to the cases and to warn parents. Many young people are falling victim to sex trafficking through social media and sites. Its such a tragic feeling to know young females my age are coming up missing. Reporter just today 15yearold Kiara Edwards was reported missing from northwest d. C. D. C. Police addressed the issue last week saying this was not an increase in cases but they were being publicized more through social media. We have no indication to believe that young girls in the district are being preyed upon by human traffickers in large numbers. Reporter but activists say they were not comforted by those words. They want to know more about the cases and whats happening to the home. Because of economic times, pimping has resurged and these men are not getting jobs. So theyre weak. What theyre doing is preying on these young women in order to pay their bills. Reporter you can take a look at that interactive map that we showed you in the piece. You can go to the nbc washington app and search missing teens. Were going to stay in d. C. Where some Small Business owners got a surprise visit today from the mayor herself. Mayor Muriel Bowser stopped by a few spotsspots. They went into a rug store, an irish pub and a pet store. Mayor bowser stopoke to the owns and employees. If youre planning to travel some this spring, dont expect an empty seat next to you on the plane. The spring travel season is expected to hit n highs. And improving economy one of the main reasons for the new travelers. The cost of a ticket also going up. The average cost of a flight expected to be about 34 higher. Big changes underway at Reagan National airport. Two huge Construction Projects are being designed to help the flow of passengers. Its going to change our entire experience at the airport. The big meeting doesnt happen until wednesday. But i just retweeted our transportation reporter adam tuss. He got a preview of those plans. Reporter so many people are flying in and out of Reagan National airport that Major Construction changes are on the way. Were about to get a detailed look at those plans. Ray neagan national is in some a victim of its own success. Over 20 million travelers per year and most love it. It feels peaceful. This just feels lovely. Reporter it is getti this is what the north section of Reagan National looks like now. Passengers have to take pbuses o board commuter planes out in the elements. This is what is planned, a brand new concourse that is expected to enhance the overall experience. Like what you see . Sure. Reporter heres another major plan change thats creating a little more uncertainty with travelers. New security checkpoints between the metro station and roadways. Moving the checkpoints from the main hall to this area, means that the main hall with shops would now be behind security. Where you are right now would actually be behind security. Oh. Reporter the Airports Authority explaining how some of this would work. From the top of these checkpoints there will be beautiful skylights that let Natural Light into the security checkpoint. Reporter the authority says businessesay more revenue because travelers would have more time to spend post security. Change isnt always easy pfor some. Now, all of these changes will take years to complete. But some of the preliminary work is expected to start this year. Up next, a deeper dive into President Trumps Budget Proposal and what it could mean for metro rider who is riders. Nearly a dozen peopl were welcome to spring. Today is the first day of spring. People are celebrating the warmer weather. Its getting a lot of attention on social media as people are posting pictures of the change in seasons. Doug, i know its the first day of spring, but it didnt get quite as warm as we were hoping. Not at all. Temperatures today could have easily made upper 50s to around 60. But we saw a lot of cloud cover come in courtesy of a little system off to the west. Were watching another system that could bring us more clouds tonight and showers out there too. The clouds definitely keeping a lid on temperatures. Right now coming in at 52 degrees. Temperatures overnight dropping from the 50s into the 40s. Not going down that much at a from where we are now. Going for a low tonight of 46. 50 in martinsburg, 48 gaithersburg, 57 fredericksburg. Also cool along the chesapeake. 48 degrees in annapolis right now. No rain. Again, these clouds did not have any rain associated with them. But they did come from a system that was causing rain. Pretty strong system. Then it really dies out as it moves down. Theres another one starting in chicago and moves on down through the ohio valley and into parts of our region. I dont think its going to make it here tonight. All in all, most of us should stay dry tonight. By midnight, notice some showers to our west with that system but th tomorrow morning a couple of showers back to the west. Again, most of us stay dry. Through 1 00 were still in the clouds. Now, we see the sunshine tomorrow afternoon. That allows the sun to come out and that also allows the temperatures to warm during the day. Highs in the upper 50s to low 60s across our area tomorrow. Wear that jacket in the morning. Youll need it. Sunglasses late in the day. Here are those temperatures were going for. 58 hagerstown. Next couple of days, look how much colder we are on wednesday. A high of only 46. Windchills in the 30s all day. 49 on thursday. Less wind on thursday. Thursday definitely better. But wednesday is going to be one cold day. Breezy on friday. 74 degrees coming up on saturday. Right now ive got a sunday. A disturbing discovery after a home in rockville was reduced to rubble. What we now know about