The Air & Space Museum is the most popular Smithsonian museum; everyone flocks to see the Wright brothers' flyer, Chuck Yeager's Bell X-1, Charles Lindbergh's Spirit of St Louis and the Apollo 11 command module. An IMAX theater, planetarium and ride simulator are all here (adult/child $9/7.50 each). More avionic pieces reside in Virginia at the Steven F Udvar-Hazy Center, an annex to hold this museum's leftovers.