4-20-12: Today in History
Lead Story
Castro announces Mariel Boatlift, 1980
American Revolution
New York adopts state constitution, 1777
Automotive
Danica Patrick becomes first woman to win Indy race, 2008
Civil War
Lee resigns from U.S. Army, 1861
Cold War
Korean Air Lines jet forced down over Soviet Union, 1978
Crime
A massacre at Columbine High School, 1999
Disaster
San Francisco firefighters halt massive blaze, 1906
General Interest
Siege of Londonderry begins, 1689
Ku Klux Act passed by Congress, 1871
Curies isolate radium, 1902
Columbine High School massacre, 1999
Hollywood
New sound process for films announced, 1926
Literary
First detective story is published, 1841
Music
"Mambo King" Tito Puente is born, 1923
Old West
Militia slaughters strikers at Ludlow, Colorado, 1914
Presidential
McKinley asks for declaration of war with Spain, 1898
Sports
Jordan scores 63 points in playoff game, 1986
Vietnam War
Nixon announces more troop withdrawals, 1970
"Fragging" on the rise in U.S. units, 1971
World War I
Nivelle Offensive ends in failure, 1917
World War II
Operation Corncob is launched while Hitler celebrates his birthday, 1945
http://www.history.com/this-day-in-history