ON THIS DAY
1864 – American Indian Wars: Sand Creek massacre: Colorado volunteers led by Colonel John Chivington massacre at least 150 Cheyenne and Arapaho noncombatants inside Colorado Territory.
1877 – Thomas Edison demonstrates his phonograph for the first time.
1929 – U.S. Admiral Richard E. Byrd leads the first expedition to fly over the South Pole.
1952 – Korean War: U.S. President-elect Dwight D. Eisenhower fulfills a campaign promise by traveling to Korea to find out what can be done to end the conflict.
1961 – Project Mercury: Mercury-Atlas 5 Mission: Enos, a chimpanzee, is launched into space. The spacecraft orbits the Earth twice and splashes down off the coast of Puerto Rico.
1963 – U.S. President Lyndon B. Johnson establishes the Warren Commission to investigate the assassination of President John F. Kennedy.
1972 – Atari releases Pong, the first commercially successful video game.