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The National Air and Space Museum of the Smithsonian Institution, also called the Air and Space Museum, is a museum in Washington, D.C., in the United States. Established in 1946 as the National Air Museum, its main building opened on the National Mall near L'Enfant Plaza in 1976. In 2018, the museum saw about 6.2 million visitors, making it the fifth-most-visited museum in the world, and the second-most-visited museum in the United States. In 2020, due to long closures and a drop in foreign tourism caused by the COVID-19 pandemic, museum attendance dropped to 267,000. The museum is a center for research into the history and science of aviation and spaceflight, as well as planetary science and terrestrial geology and geophysics. Almost all of its spacecraft and aircraft on display are original primary or backup craft (rather than facsimilies). Its collection includes the Apollo 11 Command Module Columbia, 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, the model of the starship Enterprise used in the science fiction television show Star Trek: The Original Series, and the Wright brothers' Wright Flyer airplane near the entrance. The museum operates a 760,000-square-foot (71,000 m2) annex, the Steven F. Udvar-Hazy Center, at Dulles International Airport. It includes the Mary Baker Engen Restoration Hangar, which houses the museum's restoration and archival activities. Other preservation and restoration efforts take place at the Paul E. Garber Preservation, Restoration, and Storage Facility in Suitland, Maryland. The museum's main building on the National Mall is undergoing a seven-year, $360M renovation that started in 2018, during which some of its spaces and galleries are closed. From Wikipedia
