Smithsonian National Air & Space Museum
The Milestones of Flight entrance hall of the National Air and Space Museum in Washington, DC.
The National Air and Space Museum of the Smithsonian Institution, also called the NASM, is the second most-visited museum in the world, and the most-visited museum in the United States. The museum contains the Apollo 11 command module, the Friendship 7 capsule which was flown by John Glenn, Charles Lindbergh's Spirit of St. Louis, the Bell X-1 which broke the sound barrier, and the Wright brothers' plane near the entrance. Almost all space and aircraft on display are originals or the original backup craft. It operates an annex, the Steven F. Udvar-Hazy Center, at Dulles International Airport.