The small museum eventually becomes the National Air and Space Museum -- The most visited museum in the world .
1946 -- President Harry Truman signs a bill authorizing an appropriation of $50,000 to establish a National Air Museum in the Smithsonian Institution in Washington , D.C.
The small museum eventually becomes the National Air Museum         -- The most visited National Air Museum in the world .
1946 -- President Harry Truman signs a bill authorizing an appropriation of $50,000 to establish a National Air Museum in the Smithsonian Institution in Washington , D.C.