ON APRIL 30, 1975, the Vietnam War ended as the South Vietnamese capital of Saigon fell to Communist forces.
In 1789, George Washington took the oath of office in New York as the first president of the United States.
In 1803, the United States purchased the Louisiana Territory from France for 60 million francs, the equivalent of about $15 million.
In 1900, engineer John Luther "Casey" Jones of the Illinois Central Railroad died in a train wreck near Vaughan, Miss., after staying at the controls in a successful effort to save the passengers.
In 1945, as Soviet troops approached his Berlin bunker, Adolf Hitler committed suicide along with his wife of one day, Eva Braun.
In 1968, New York City police forcibly removed student demonstrators occupying five buildings at Columbia University.
In 1970, President Richard M. Nixon announced the U.S. was sending troops into Cambodia, an action that sparked widespread protest.
In 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. (The man, convicted of causing grievous bodily harm, was given a suspended sentence.)
In 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."