Officials at Metro, Washington's public transportation system, said by 3 p.m. Saturday about 369,900 people had used the system, well ahead of a typical Saturday that sees usage between 325,000 and 350,000. Final numbers are expected Monday. 

The National Park Service doesn't estimate attendance although the New York Times had reported that the Park Service told Viacom, the owner of "Comedy Central," that more than 200,000 were on the Mall.