Description: The National Air and Space Museum was established in 1946 to care for the Smithsonian’s growing aeronautical collections. On July 1, 1976, a new building opened on the National Mall to showcase the collection. In December of 2003, the Udvar-Hazy Center opened near Dulles Airport in Virginia to display additional collections. History of the National Air and Space
Description: In honor of the anniversary of the discovery of x-rays, a look inside the Foucault pendulum that used to hang at the National Museum of American History.