1775 American Revolutionary War: The Battle of Lexington and Concord which began the American Revolutionary War.
1943 World War II: In Poland, German troops enter the Warsaw ghetto to round up the remaining Jews, beginning the Warsaw Ghetto Uprising.
1961 The Bay of Pigs invasion of Cuba ends in success for Cuba.
1976 Executive Order 9066 is rescinded.
1989 A gun turret explodes on the USS Iowa, killing 47 sailors.
1993 The 51-day siege of the Branch Davidian building outside Waco, Texas, USA, ends when a fire breaks out. Eighty-one people die.
1995 Oklahoma City bombing: The Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, USA, is bombed, killing 168. That same day convicted murderer Richard Wayne Snell, who had ties to bombing suspect Timothy McVeigh, was executed in Arkansas.
