20th Century Events By corriherab Apr 11, 1906 Einstein Publishes Theory of Relativity Jul 26, 1908 FBI Formed Jul 25, 1909 First Airplane Flight May 23, 1915 World War I Begins Jun 28, 1919 World War I Ends Oct 24, 1929 Stock Market Crash - Beginning of Great Depression Sep 1, 1939 World War II Begins May 8, 1945 VE Day Jun 26, 1945 UN Charter Signed Aug 6, 1945 First Atom Bomb Used on Japan Aug 14, 1945 VJ Day - End of World War II Aug 29, 1949 Russia Detonates Their First Atom Bomb - Begins Cold War Apr 12, 1961 First Man in Space Aug 13, 1961 Berlin Wall Erected May 3, 1963 Martin Luther King Jr.'s "I Have a Dream" Speech Nov 22, 1963 JFK Assassinated Jul 20, 1969 First Men To Land on Moon Aug 16, 1969 Woodstock Music Festival Apr 12, 1981 First Space Shuttle Mission Apr 23, 1984 AIDS Identified