Gunman massacred a dozen people. Police say the Lessons Learned from that dark day in 2013 ruled in a smooth, wellcoordinated response today. This turns out to be a great exercise for us and fix what we wanted to fix and nobody is hurt and no evidence of any shots fired. Reporter the navy is evaluating if todays Police Action may have brought back disturbing member ries for some employees, especially the ones who worked here at the time of the 2013 shootings. Ness based pop the events of a couple years ago, we have counselors and our chaplins are with them now, providing the support that they need or desire. Reporter now lets go to my colleague, news4s pat comes who has reaction from some of the people at the navy yard. Pat . Reporter chris for many people at the navy yard, the shooting scare is hard to deal with up here and really hard to deal with here. Today, on the day of the big shooting scare at the navy yard, people who were here two years ago when there was a real shooter, when there were a dozen fatalities, people who went through that had flashbacks as they went through this. Does it bring back memories . Yes it did. I lost a dear friend the first time. So so, what now . Im going to go home. Im gonna go home and hug and kiss the ones i love. Reporter meet now kristen crawford. She was there then. She was here today. This has not been size for her. How was it different from the last time . We knew what was going on. This time . Yeah. We knew that there was an active shooter, they thought, so we had everything in place at work and we had we were in a very secure spot. Thats why i said i wasnt afraid. So can i get a hug . Yeah. Reporter i dont think they give out medals for lockdown veterans, but maybe they should. Coming up at 6 00, a navy officer who went ducking for cover again. Now back to you. Pat, thanks for having the presence of mind to give that hug. The u. S. Air force has canceled fourth of july celebrations in england. At 5 30, Scott Macfarlane takes us inside building 197 to show us the changes made after that last shooting, changes that made todays response so successful. Boy, today has been a wet and dreary one, a lot of folks out there wondering if they are going to be able to salvage anything out of this holiday. We have a team of meteorologists tracking those conditions. Veronica and amelia. A washout . We take our umbrellas to the mall . There will be some nice sunny periods at times and we know that you dont want your holiday to stay this way. We have got new data thats coming in so we are going to i think, find nice, bright sunshine here and there the good news is if you are traveling overall tomorrow, weather looking good talk about the fourth of july forecast, cant give the all clear, still come questions in the forecast not a total bust. Ness tough workout. Look at your travel coming up for friday, anybody going out of up to, head to areas like virginia, here we have got showers across the area, heavier rain sitting down through the northern neck. This is friday, starting at 9 a. M. , traveling down i64, i95 i81, watch what happens as we get into the afternoon, see more of the showers pop up this is 1 00 during the afternoon tomorrow, traveling out of up to south bound is where you will hit some rain. Especially off to the west and to areas of west virginia. Again, i81. Northbound, you have got some heavier rain that will start to come in during the evening and overnight friday. I will tell you the locations were i think the heaviest rain will set up and we may see flash flooding coming up tomorrow. Guys . Thanks, vj. We sent you the breaking news to your phone and now learning all three cyclists who crashed at a bike race in the world police and fire games are now in critical condition. Now this crash happened at a race this after into at the Prince William forest park. News4s Mark Segraves is with police in woodbridge. Mark what are you hearing . Reporter thats right. There are 12,000 athletes who to come from 70 Different Countries to participate in ten days worth of games. As you said three of those athletes are in critical condition, two facing lifethreatening injuries. This all happened about 12 30 at the cycling time trials in Prince William forest park as the koch pet doors were going down hill. This is how Prince William county police described the accident. We responded out right around 12 30 p. M. This afternoon to investigate a crash involving multiple bicyclists that were participating in the world police and fair games. As of right now, what we can determine is that the bicyclists were traveling down hill. One of them for an unknown reason right now, lost control of the bike and crashed, causing a chain reaction. We have three bicyclists that were significantly injured and were taken to area hospitals for treatment. Reporter now, again, those officers, those are all Police Officers who were involved in this accident, they are in critical condition, two of them facing lifethreatening injuries. We do know none of them are local. We hope to be able to tell you in the next hour more about the victims. We can tell you that the games inside Prince William forest park are canceled for the rest of the day and a posting on the Facebook Page for the games says their thoughts and prayers are with the families of those who were injured today. Wendy, back to you in the station. All right, mark see graves. For the second time, the man charged in the d. C. Mansion murders is firing his defense team. Darren wint dismissed immigration attorney sean hanover at his hearing today. Hanover took over the case after wint fired the public defender who originally was representing him. He will now go back to that public defender. Hanover told reporters after the hearing that he and Benjamin Netanyahu had and wint had a difference of opinion and believes wint was set up and more people were involved in those killings. People flying from st. Louis to dulles got a bit of a scare today, their flight had to be diverted because a passenger made threatening remarks. This happened on United Express flight 3342 and the crew diverted to an airport in columbus ohio. Everyone had to be eye vacvacuated from the plane and the woman who made the remark was taken into custody. The passenger stayed in the airport while the police checked out the plane and luggage on board. No word on when that flight will make it here to dulles. A firefighter who ended up in the hospital after put out a house fire is doing bet they are evening, sent to the hospital with fatigue and symptoms of dehydration that fire broke out along Pointer Ridge drive off crane highway in bow wish last night and we are told it started on the stove with someone cooking. One of the cats died in that fair. Three other cats are still missing. If you are going out later tonight anywhere around wheaton, you are going to want to avoid georgia avenue. cause they are still doing repairs after yesterdays massive water main break thatted intoed the area near georgia with 2 1 2 million gallons of water. Chopper4 was up over the area earlier around you can see north and south bound traffic was on the same side of the street. The Water Department says that will last through at least the evening commute. It was a high school beatup and the attacker, a Prince Georges CountyPolice Officer. Today, he learned his fate after attacking a student. And some more bad news for donald trump. If you visited any of his hotels lately, you could be at risk. Andlesss a scandal that involves a selfie stick. Now, the police are getting involved. News4 at 5 00 just getting started. The navy yard lockdown today show house the city is prepared to react to the scare. And with the fourth of july celebrations coming up we wonder how the heightened alert is impacting your maps for the celebration. Heres a look at the result of a nbc because survey as you can see right there. News4s Meagan Fitzgerald is live at the National Mall with what people close to the monuments are saying today. We talked to a lot of folks, they are well aware of the convenient that happened at the morning at the navy yard, aware of the potential terror attack this weekend for the fourth of july holiday. But they say we are constantly hearing about these potential attacks and they say they are just likening it to the world we live in. Locked down at the navy yard thursday morning with a Large Police Presence turned out to be just a scare. Good insight into how Law Enforcement will respond. Very, very well, smoothly, well coordinated response here. Reporter thats certainly welcomed news given the department of Homeland Securitys concerns over a potential attack on the u. S. Over the Holiday Weekend. There have been these potential threats out there thats what they are phones threats. Reporter Law Enforcement officials nor home happened security cited a specific attack, but official says they will remain on high alert and those participating in the festivities this weekend say they will continue to go about their business. Im not going to let it stop me from enjoying every day. We are going to celebrate the fourth of july just like we do every year, nothing different. Reporter d. C. Mayor Muriel Bowser says in light of what happened this morning, the message is still the same. If you see or hear something suspicious, Say Something right away. We are looking forward to not only the events on the National Mall celebrating the independence of our nation, but we will also stand up a significant number of events in our neighborhoods. Reporter the metropolitan police Department Says they are constantly on high alert ready to respond to any situation that might arise. Now, coming up at 6 00, the specific what we are learning about the specific is targets that Law EnforcementOfficials Say are a concern and what we learn about those terror threats. Back to you. All right, thank you, megan. Maryland state police want people who are celebrating this holiday bond to remember to find a sober designated driver. The states dedicated dui team nicknamed spider, is going to be out in force. Since that teams creation just two years ago, troopers have arrested more than 1300ment issed drunk drivers. So you dont end up driving under the influence, under any circumstance. And then, stick to those plans. The Washington Regional Alcohol Program is offering free cab rides up to 30 bucks on saturday. Search sober ride in our nbc washington app for details about when and how to take advantage. Most workers in Montgomery County will be getting paid sick leave. County leaders signed a bill today that requires companies to provide one hour of six leave for every 30 hours of work. Employees will get a maximum of seven sick days each year. Unfortunately, we do not have at the national level. Unfortunately, we do not have at the state level. But here in Montgomery County we will have it. Montgomery county is among the first jurisdictions in the nation to require sick leave. The law will take effect in october of next year. Sad news for the Virginia Tech family today. Former Athletic Director jim weaver has passed away at the age of 70. Weaver had been battling parkinsons disease since 2004. He was the hokies ad from 199207 9 91997 to 2013 and those years some of the most successful for the athletic department. He moved them into the big east conference and a cc. He retired at the end of 2013 because of his health problems. Hokey nation was a lot strong. Because of him. Yeah. Much very true. Tonight, making moves to fit one of the worlds most deadly diseases. We are talking about tuberculosis, a disease we have seen here in the d. C. Region recently. Doreen gentzler has the story of a lab working to eradicate it. Most people dont think tuberculosis is a problem anymore a disease from the past, but it actually sickens thousands of people in the u. S. Every year and now, we are hearing first happened just how devastateing tb can be. I dont think that people actually get tb but thats what they said that i had. Reporter it was the fall of 2013 and chaka brown says add little cough. There was a built of a cold and fever. Sounds like symptoms of the flu maybe, not so much to worry about, but when weeks went by and things had gotten even worse, his doctors sent him to the emergency room. My eyes, i was seeing weird i was walking weird. My ears i was, like, going deaf in one ear. Reporter doctors diagnosed brown with disseminated to you tuberculosis tuberculosis. The bacteria was not just in his lungs but all over his body including his liver his brain and his prostate. He spent four moments in the hospital where doctors gave him massive doses of antibiotics. I remember sitting there and looking and i had a table and it was 27 pills in front of me and wasnt like 27 pills that day it was 27 pills at that time. Reporter weeks after he was released from the hospital doctors found lesions in his brain that were getting bigger, meaning the tb bacteria was still wreaking havoc in his body. Chaka underwent brain surgery to remove the growth. We say tb any were is tb everywhere and its true, because it spreads through the air. Reporter ann ginsburg is a chief medical analyst working to create a private it b sack veep. Their focus is preventing the disease in young adults the ones most likely to spread the bacteria. Right now there is a vaccine for newborns but it doesnt last very long and typically, babies dont spread tb because it doesnt attack their lungs. It clearly suspect controlling the epidemic, even though 90 of newborns get vac sip nated with it. Reporter in the u. S. , about 10,000 people are diagnosed with tuberculosis every year more than half foreignborn citizens but look at the disease on a global scale and you can see just how devastating it really is. Each year more than 9 Million People are diagnosed around the world. 1. 5 million will die. Adding to the problem, tb bacteria continues to mutate, making it tougher to treat. That includes the recent case of a woman being held in isolation at nism ismnih. The ultimate game changer is a vaccine. Reporter chaka brown was finally sent home from the hospital march 2013 but toad keep taking antibiotics until hs after he was first admitted to the hospital. That was a sense of relief, but a big sense of freedom. Reporter one thing to keep in mind about tb only about 10 of people infected with it will develop active disease and most of those people are immunosuppressed, but and doctors dont know why, otherwise Healthy People like chaka brown, can get sick from tb. The folks there is still so much more testing to do on the vaccine that they are developing. Probably going to be another ten years before we see one hit the market. Wow. All right. Thanks dore reasonable lots more to come on this. Yeah. Talk about freak accident a Virginia Home catches fire probably wouldnt have happened if it wasnt trash day. We are going to show you more from the scene of this explosive blaze. Plus fares are up ridership down. We will learn more about the trouble coming down the track for the vre. The sister of the accused South CarolinaChurch Shooter is asking for money. We will tell you why someone set up a today on the cool side, we at least have warm conditions coming up for the Holiday Weekend, but still a chance of rain. So its all about the timing and getting it right right for your cookout. See what is going on right now, showers that move through our area and i think we are done with some of those spotty, stray showers for a while. The last exiting out of app arundel county areas like chester town and cambridge right now. Meanwhile, talking about more rain moving back in. In fact could be a lot of rain for friday night into saturday morning that may lead to some flash flooding, maybe southwest waterfront, see the water levels rise in a hurry. Look at all the rain we are expecting, friday into saturday morning until about noontime on saturday. In the green thats half inch. Gatorsburg, d. C. , manassas, leesburg, here through southern maryland, areas south and west, la ray, culpepper more than an inch of rain, locations down here where saturday afternoon and saturday evening, see a shower or two, thunderstorm fire up. Thats kind of our best location, 77 degrees now, still dry as we get into the evening, 75 by 9 00, on the cool side going out, might need a sweater. We can see the clouds break at least it is dry. Best chance of sunshine early in the day tomorrow, roads could be a little damp. By afternoon we increase our chances of rain, the weather will have a moderate impact on the road buys the evening, a higher chance of rain coming into the area. Impact forecast for tomorrow is between low and moderate, it is going to be another gray and cool day almost a carbon copy day. Coming up temperatures starting out early tomorrow morning around 64 to 71 degrees and that means that im getting a thumbs down for the pool forecast tomorrow. Otty showers, just so overcast. Not going to be able to get much sun. Take a look at friday night. This is at 9 00, if youre going out. Here is some of the heavy rain. Comes right through our area especially areas, d. C. South of 66 down i95 fredericksburg, then starts pivoting out here by saturday morning where we get a break, so for saturday early, this is a look at your probability of rain. Its early in the day your chances, at 7, 11 a. M. About a 60 to 80 chance as we get into the afternoon and evening hours, that threat drops. So around 3, 7 00, talking about a 20 to 30 chanc