Tourists pass under the closed U.S. Department of Energy while approaching the also closed Smithsonian Castle in Washington atop a Big Bus double-decker tour bus, on the second day of a U.S. government shutdown, October 2, 2013. The lawmakers who shut down the U.S. government on Tuesday have the best view of the result from their perch in the U.S. Capitol: a two-mile stretch of museums, monuments and federal buildings along the National Mall that were closed for business. Most of the popular stops on this bus tour were closed due to the government shutdown. REUTERS/Gary Cameron (UNITED STATES - Tags: POLITICS BUSINESS TRAVEL)