historical events By Karlii Jul 28, 1914 World War I the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918 Aug 27, 1920 First U.S. Radio emissions Nov 24, 1922 Discovery in Egypt from the tomb of Tutankhamun Sep 28, 1928 Alexander Fleming discovered penicillin Aug 6, 1945 Atomic bomb in Japan: Hiroshima and Nagasaki Apr 18, 1955 Death of physicist Albert Einstein Feb 20, 1969 Neil Armstrongreaches the Moon Aug 12, 1981 IBM introduces the first personal computer (PC) Jul 5, 1996 Cloning of Dolly the sheep Sep 11, 2001 Attack on the Twin Towers in New York Feb 20, 2005 Death of Pope John Paul II