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April 19

1775

The "shot heard around the world" was fired. Colonial Minute Men took on British Army regulars at Lexington and Concord, Mass., starting the American Revolution.

1824

Lord Byron died of a fever while helping the Greeks fight the Turks.

1882

Naturalist Charles Darwin, developer of the theory of evolution, died.

1897

The first Boston Marathon was run.

1933

The United States went off the gold standard.

1943

The Warsaw ghetto uprising began, one of the first mass rebellions against the Nazis.

1993

The siege at Waco, Texas, ended when FBI moved into the Branch Davidian compound with tear gas and cult members set fire to the compound killing over 80 people.

1995

The Alfred P. Murrah Federal Building in Oklahoma City, Okla., was destroyed by a car bomb. 168 people, including 19 children were killed in the worst terrorist attack in U.S. history up to that time.