1963 at 50: A year's tumult echoes still - Article Photos 6/15

FILE - In this May 1, 1963 file photo, a Naval rocket is exhibited in Moscow's Red Square past a banner of Vladimir Lenin, Friedrich Engels and Karl Marx during the annual May Day parade in the Soviet Union. Under the shadow of the Cold War's threat of "mutually assured destruction," 1963 was the year of dawning arms control between the U.S. and the Soviet Union; they signed a Nuclear Test Ban Treaty. (AP Photo/File)