 Mike Litterst with the National Park Service says the Lincoln Memorial will be closed because of safety concerns tied to construction there. In D.C., Scott Gellman, WTOP News. This year's fireworks show is set to start at 9.09 p.m. Thursday night and last about 17 minutes. Coming up after traffic and weather here on WTOP, does somebody you know buy a new car or truck this spring? It seems to have been a strong spring for vehicle sales. We'll have more on the way.