April 20, 1861
Robert E. Lee resigns his commission in the U.S. Army to command the forces of the state of Virginia.
1918
The Red Baron,
Manfred von Richthofen, shoots down his final victim.
1945
Adolf Hitler makes his final trip to the surface from the
Führerbunker. It is his 56th birthday.
1946
The League of Nations is offically dissolved.
1972
Apollo 16 lands on the moon.
1999
Columbine high school shooting kills 13, and injures 21.
2007
Johnson Space Center shooting
2010
The semi-submersible drilling rig
Deepwater Horizon explodes and burns.
Oil spills for six months.
Births
Adolf Hitler-1889; Bruce Cabot-1904; Lionel Hampton-1908; John Paul Stevens-1920; George Takei-1937; Jamie Gillis-1943; Veronica Cartwright-1949; Jessica Lange-1948; Luther Vandross-1951; Clint Howard-1959; Hank the Angry Drunken Dwarf-1962; Andy Serkis-1964; Mike Portnoy-1967
Deaths
Chief Pontiac-1769; Bram Stoker-1912; Steve Marriott, Don Siegel-1991; Benny Hill-1992; Christopher Robin Milne-1996; Rick Rude, Señor Wences-1999