1789: George Washington took the oath of office in New York as the first president of the United States.
1803: The United States purchased the Louisiana Territory from France for 60 million francs, the equivalent of about $15 million.
1812: Louisiana became the 18th state of the Union.
1912: Universal Studios had its beginnings as papers incorporating the Universal Film Manufacturing Co. were filed and recorded in New York State.
1945: As Soviet troops approached his Berlin bunker, Adolf Hitler committed suicide along with his wife of one day, Eva Braun.
1968: New York City police forcibly removed student demonstrators occupying five buildings at Columbia University.
1970: President Richard Nixon announced that the U.S. was sending troops into Cambodia, an action that sparked widespread protest.
1973: President Richard Nixon announced the resignations of top aides H.R. Haldeman and John Ehrlichman, Attorney General Richard G. Kleindienst and White House counsel John Dean, who was actually fired.
1975: The Vietnam War ended as the South Vietnamese capital of Saigon fell to Communist forces.
1993: Top-ranked women's tennis player Monica Seles was stabbed in the back during a match in Hamburg, Germany, by a man who described himself as a fan of second-ranked German player Steffi Graf.
2004: Arabs expressed outrage at graphic photographs of naked Iraqi prisoners being humiliated by U.S. military police; President George W. Bush condemned the mistreatment of prisoners, saying "that's not the way we do things in America."