A Changing World By Ben Howard Aug 6, 1945 Atomic Bomb Dropped on Hiroshima Aug 9, 1945 Atomic Bomb Dropped on Nagasaki Sep 2, 1945 World War 2 Ends Oct 24, 1945 United Nations Formed Jan 1, 1947 Cold War Begins Jun 25, 1950 Korean War Starts Jul 27, 1953 Korean War Ends Nov 1, 1955 Vietnam War Starts Jul 20, 1969 Moon Landing Apr 30, 1975 Vietnam War Ends Nov 9, 1989 Berlin Wall Falls Dec 26, 1991 Cold War Ends Sep 11, 2001 9/11 Bombings