both the army surgeon general patricia owe roy yoe and secretary of the army john mchugh declined toe interviewed for this story. at a briefing in washington, mchugh recently told reporters that the army takes the problems that nbc dallas first reported seriously and more wtu changes may be coming. >>> they are getting ready for a big weekend on the national mall. here is a live picture of the mall as crews set up for a big earth day event and concert saturday. organizers expect about 250,000 people are going to show up. some big acts have signed up to perform no doubt usher, fallout boy. expect road closures around downtown most of the day on saturday because the concert runs all day. check the nbc washington app before you head out to avoid delays. quite a lineup. >> yes. thousands of people wanting to know what the weather will be like on saturday. >> still awesome? >> the best part is i have free tickets to that. >> oh, you know somebody. >> everybody has free tickets. >> right. >> it's a free event. everybody is special that day. >>> the weather will be great. this is saturday w