On this day in history - Today, April, 9

Today in History

• 1860 The world's first recording of the human voice is created

  French inventor Édouard-Léon Scott de Martinville used his phonautograph, the earliest known sound r

• 1940 Germany invades Denmark and Norway

  The rationale of Operation Weserübung was to secure access to Swedish iron ore. In Norway, a resista

• 1952 The Bolivian National Revolution overthrows Hugo Ballivián's government

  The nationalist movement initiated radical reforms, including universal suffrage, the nationalizatio

• 1967 The first Boeing 737 takes off on its maiden flight

  The short-to-medium range plane is the best-selling airplane in history.

• 2005 Prince Charles marries Camilla Parker Bowles

  Charles was formerly married to Diana, Princess of Wales. His second marriage to Camilla made him th