At the least it means tighter security at all three airports here and right now were getting a look at some new images from that airport in brussels. This Surveillance Video released by Belgian Police shows three men believed to have been part of this mornings attacks. Nbc news contributor Christopher Dickie breaks down the latest details in the investigation from brussels. Terror struck right in the heart of europe, the heart administratively and emotionally, a beautiful city, brussels, belgium. What happened . This morning at least one bomb went off in the Brussels Airport. Everyone was in panic. We had to run. Just because the situation was such everyone was scared. So everyone run. More than 20 people were killed and injured at a metro station. We felt a small blast of and we heard some thudding in the distance. The net result is that this is a city on edge and a continent on edge. If you look at the fugitive suicide bombers at the airport, the pictures that have been circulated, that apparently are of them. Theyre not wearing suicide vests. Theyre not set up the way we expect suicide bombers to be. Theyre just pushing suitcases on trolleys in front of them. The thing to remember is, they didnt do it the way they always did it before. And thats what makes these guys so scary. Back to you. Well, its been a very tense day for College Students studying abroad. And their families. Max okobayashi is a 20yearold junior at American University. Studying european politics at nato. To get to classes in brussels, he usually takes the same metro line hit by the explosion today. This morning he went to work using an aboveground tram. But some of very close call on that metro line. I talked to him via skype. It was really scary to find out that some of my friends were close to the bombing. Several of them were on trains, either just before or just after the bombs went off on the same line. And if they had been any sooner or later, they could have been hurt and fortunately everybody is safe. Now coming up in the next hour, how okabayashi learned about the explosions. And the American Universitys School Administrator have posted on their facebook page. Saying all students are safe and accounted for and their thoughts are with those who have been impacted by the events. Metro has stepped up patrols around some rail stations, even though there are no known threats. Youre going to see more Police Officers and canine security sweeps. News4s transportation adam tuss is live at the Lenfante Plaza station. Can you give us an idea of how metro responding to the attack overseas . What metro is doing is what they always do when there is a terror threat. Theyre stepping up their response in response to whatever happened there. But they say there is no credible threat. You mentioned that, thats the most important thing. Weve got another busy rush hour under way here at Lenfante Plaza. This is the place where so many buses come and drop off riders and people come and go all day long. We did see transit Police Officers earlier around this area. There are some Police Officers who are down in the stations taking a walk around. Canine teams are going to be out. And what metro tells us is that their transit Police Officers are basically overlapping their shifts right now. And overtime is happening. Regardless, after all of this, brussels is on the mind of metro riders. Its scary. Its very scarey. You know, its coming to a city near you, i know. I know its on its way, its scary stuff. Hopefully something can be done about it. And we continue to look at people making their way tonight here at the Lenfante Plaza metro station. Ky tell you that metro Transit Police have been on multiple Conference Calls with other large u. S. Transit systems. They say theres no credible threat. Guys, back to you. All right. Adam, thank you. You can also expect to see changes and a major show of force at the airports. Northern Virginia Bureau reporter david culver shows us the scene from dulles. Here at dulles airport, the one flight that was scheduled to head to brussels tonight has been canceled. Security at high levels here. Certainly increased. We can show you what it looks like outside the airport at the curbside checkin area. Not only marked police vehicles, but also Armored Police vehicles are out there. Inside you see there are almost that are walking through the terminal. Theyre carrying rifles, theyre waring bulletproof vests. They also have canine units throughout the airport today. Weve noticed them searching anything from trash cans to luggage to even our own camera. Just ahead on news4 at 5 00, we speak to one security expert, who has some advice for airports when it comes to expanding certain security areas. Now he says as youve noticed, probably, security pretty tight especially once you go through the tsa section. But what do you do for the general checkin area . We look at it ahead on news4 at 5 00. A plane that left brussels minutes before the explosions landed this afternoon in florida, just outside of orlando. The plane was sent to the far end of the airport property. A lot of Police Officers met up with that plane. Passengers were bussed to a holding area. There was no threat involving the flight, but Officials Say they wanted to take extra steps here in northwest d. C. , flags are flying halfstaff outside the Belgian Embassy around mourners are bringing flowers to honor the victims. Weve seen more secret Service Agents outside that embassy. Were going to go live there for a live report coming up at 4 15. Lets turn to the weather. And storm team 4 chief meteorologist Doug Kammerer in the storm center. Whats it like out there today, doug . Not a bad day to get out and about. Cherry blos oms coming out the next couple of days. And baseball season. Take a look, out towards rockville. This is Richard Montgomery high school. The team out there, theyre having a little baseball practice this afternoon. I miss my baseballplaying days. More like spring over the next few days. Baseball will be even better tomorrow. Highs in the 70s tomorrow and thursday, friday, cooler. Average high this time of year is 58. Notice as the camera swings around, every day will be above average. At least in the city. So thats good news out there, too. Now tonights headlines, getting warmer across tracking showers, ill show you when the showers move in and who has the best chance to see the showers. Watching our holiday weekend, let you know if theres any problems associated with the weather as we make our way through the next couple of days. Guys . All right, doug. President obama wraps up his historic trip to cuba. But the attacks in belgium top his agenda. More on that, plus what the president ial candidates are saying about it. Were following breaking news out of fredericksburg. Chopper 4 is over the scene of a policeinvolved shooting. Well be back with its about taking a stand. For too long, wall street banks had their way. They crashed our economy. But democrat Donna Edwards wont take their money because she stands up for us. As a single mom, she knows the challenges our families face. Shell be our voice. Tightening regulations on the big banks and fighting to keep dark money out of politics. Democrat Donna Edwards, marylands next senator. At the live desk were following breaking news in fredericksburg. Police say theres been a shooting involving one of their officers. Chopper 4 has just arrived over the scene, were waiting to get images from the chopper. This is kenlock and brayhead drive, a couple miles south of the university of mary washington. Police say the shooting happened after a traffic stop and pursuit at about 1 00 p. M. One man is seriously injured. The officer was not shot, taken to the hospital as a precaution. And Virginia StatePolice Taking over this investigation in fredericksburg. Were going to keep a close eye on this and have updates here and on the nbc washington app. Things are back to normal at Howard University hospital. A water main broke in the main buildings basement yesterday and flooded the Critical Care area. Staff had to relocate eight patients, cancel appointments and divert ambulances to other hospitals. A public hearing this afternoon about proposed new rules for tanning beds in montgomery county. The county council is considering requiring salons to post warnings about the risk of Cancer Associated with tanning beds and banning minors from using those beds. State law already requires minors to have a parent sign a release form. One salon manager says most minors opt for spray tans, anyway. Unless theyre preparing for a vacation, where they dont want to get sunburned. Well the candidates are speaking out on what trail on another day of primaries. Were going to hear what they have to say. This is chris gordon at the embassy of belgium in northwest washington. Ahead, how people from our area are sharing their sadness over tods terrorist bombinaygs fios is not cable. Were wired differently. In the last 10 years our competitors have received a few awards. But weve received a few more, including jd power who ranked us highest in Customer Satisfaction for the third year in a row. Only fios has the Fastest Internet on the most awarded network. Now get superfast 100 meg internet tv and phone for just 69. 99 per month, online. Cable cant offer internet speeds this fast at a price this good, only fios can. Glenn threateningicans gofederal workers;ns over 60 votes to repeal obamacare. Now theyre refusing to even consider president obamas nominee for the supreme court. It disrespects the president and all of us and we wont put up with it. In congress, ill protect president obamas legacy, defend obamacare, and stand up for Social Security and medicare. Im glenn ivey and i approve this message. Ill take on republicans for all of us. The latest now on the explosions at a Brussels Airport and subway station. Right now Belgian Police are conductsing a series of raids across the country during the search of one house Authorities Say they found an explosive device that contained nails as well as chemicals and an isis flag. Investigators believe two men staged suicide bombings at the airport, and a third man ran off. At least 31 people were killed, 190 wounded in the attacks today. President obama is heading to argentina, before he left will, that the United States is going to back up the authorities in belgium and help them seek justice. The white house released this photo of president obama conferring with National Security adviser susan rice at the u. S. Embassy in havana. On the phone with Homeland Security adviser lisa monaco. Getting advice on the bombings. This is yet another reminder that the world must unite. We must be together. Regardless of nationality, or race or faith. In fighting against the scourge of terrorism. The president called belgium Prime MinisterCharles Michel and offered his condolences and the republican president ial candidates are doing the same on social media and theyre criticizing president obamas response. John kasich says the president must return home immediately and get to work with our allies. And ted cruz is at where with us and we cannot defeat it if we refuse to name it and Hillary Clinton says these terrorists seek to undermine the Democratic Values that are the foundation of our way of life and will never succeed. Bernie sanders is calling it a ban barrick attack and offering his condolences to the people of brussels. In washington many are expressing their support for the terror attack victims. And the survivors. News4s chris gordon is live at the Belgian Embassy with more on the show of solidarity and the show of strength there. Chris . Well, it has been quiet most of the afternoon, with people coming to leave tlaurs and say a prayer behind me. You see evangelist mary clement of silver spring. Talking to an agent from the secret service. As they are making sure that security is tight. The flags of europe and belgium are at halfstaff. Today there is a shared sense of loss. Plants to the growing memorial for the lives taken in todays terrorist attacks in brussels. It was my mothers idea and she, we have family back in belgium. A lot of them actually mixt gra. My grandfather was an immigrant during world war ii. Were keeping them in our thoughts and prayers during all the horrible stuff going on over there right now. U. S. Secret Service Officers are part of the heightened security here at the embassy of belgium in northwest washington. Ambassador Johan Verbeke says theres been no threat made here in washington. We are resilient people. Well stand on our feet, and im sure that with the strength, not just of our own Security Services and intelligence community, but also the strength of the international community. We will overcome that. And we will survive. Ahead at 5 00, well hear why a family who came here today to apply for visas say that the Terrorists Attack will not change their travel plans. Thats the latest live from the Belgian Embassy in northwest washington. Back to you in the studio. Thanks, chris. Right now were getting reports of some long lines outside polling places in arizona. Where democrats and republicans are holding primaries. Donald trump and Hillary Clinton are leading with 98 delegates at stake for republicans and 149 for democrats. Both parties are holding caucuses in utah and democrats also caucus in idaho. Senator ted cruz won the Republican Caucus in that state earlier this month. Ag out there right now, looking good across our region. Plenty of sunshine, bright blue skies, temperatures a little bit warmer, upper 50s to low 60s today. Temperatures about five to ten degrees warmer than theyve been over the past couple of days. A beautiful shot, 61 degrees, winds out of the south at 16 miles per hour. Again the winds helping to produce the warmer numbers, along the water, still quite clear. 61 leesburg. 63 in charlottesville. Nice everywhere today. Still with the breeze, its a little bit cool, but not bad at all. Storm team 4 radar. Not going to see rain or snow any time soon. What were going to see, see these clouds right in here . Thats actually a warm front thats going to be moving through the region. And as it does, well see even warmer air move in during the day tomorrow. Out at the bus stop temperatures will be a lot warmer than this morning. Back to about 50 degrees early in the morning. 70 degrees by the time youre heading home or by the time the kids are heading home between 3 00 and 4 00 with plenty of sunshine during the afternoon. A mix of sun and clouds really. 71 the High Temperature d. C. , 73 in fredericksburg. Did you do this graphic or did i . You did. I did, i put 7 degrees in culpepper. Trying to blame veronica and it didnt work. Few days, exercise, were lunch outdoors, beautiful. Enjoy around town. No problems at all. A phenomenal forecast really good forecast for the beginning of the Cherry Blossom festival coming up this weekend and for the weekend forecast for easter. 71 on your wednesday and 75 on thursday, most areas at least around 70 degrees. If not 75. We have in d. C. Some areas a little bit warmer. It will be rather breezy on wednesday, gusting 2025 miles per hour. The winds producing the warmer temperatures, rain moves in thursday night to early friday morning. It should be done around 9 00 amt. It may affect the earlymorning rush a temperature of 68 on saturday. On saturday, temperature around 60 degrees, nice weather moving in weve got the weekend forecast. Veronica has that, ill change it for her so its good for her coming up at 4 45, youre welcome, vj. Do law got to do, doug. Got to help my friends. A fight between apple and the fbi put on hold as th nations top cop finds a way to get into the San Bernardino shooters iphone. The next big deadline in this controversial case. And our nbc washington survey, have todays attacks made you more nervous or anxious about taking a train or flying . Call or text the number on your screen or head over to the nbc in a time of crisis, social media may be the only way to communicate with friends and loved ones. Yeah, especially if cell service is unavailable. Susan hogan explains what happens. Within minutes of the brussels terror attack, facebook activated what they call a safety check feature this allows users in a tragedy or national zaster to mark themselves as safe. Now heres how it works. Facebook will actually locate those users in the affected area. And ask if theyre safe. Users can then have the choice to either click on im safe or im not in the area. Facebook will also alert users if their friends checked in with a safety check feature so you know if they