1845 The U.S. Congress passed legislation overriding a U.S. President’s veto. It was the first time the Congress had achieved this.
1863 Free city delivery of mail was authorized by the U.S. Postal Service.
1885 The American Telephone and Telegraph (AT&T) was incorporated in New York as a subsidiary of the American Bell Telephone Company.
1909 Aviators Herring, Curtiss and Bishop announced that airplanes would be made commercially in the U.S.
1910 In New York, Robert Forest founded the National Housing Association to fight deteriorating urban living conditions.
1918 The Treaty of Brest Litovsky is signed by Germany, Austria and Russia, ending Russia’s participation in World War I.
1931 "The Star Spangled Banner" by Francis Scott Key becomes the official national anthem of the United States.
1939 In Bombay, Ghandi began a fast to protest the state's autocratic rule.
1945 Superman encountered Batman and Robin for the first time on the Mutual Broadcasting System.
1959 The San Francisco Giants name their new stadium Candlestick Park.
1969 Sirhan Sirhan testified in a Los Angeles court that he killed Robert Kennedy.
1974 About 350 people died when a Turkish Airlines DC-10 crashed just after takeoff from Orly Airport in Paris.
1985 The TV series “Moonlighting,” starring Cybill Shepard and Bruce Willis, airs for the first time.
1991 25 people were killed when a United Airlines Boeing 737-200 crashed while on approach to the Colorado Springs airport.
1991 Rodney King was severely beaten by Los Angeles police officers. The scene was captured on amateur video.
1994 The Mexican government reached a peace agreement with the Chiapas rebels.
1995 A U.N. peacekeeping mission in Somalia ended. Several gunmen were killed by U.S. Marines in Mogadishu while overseeing the pull out of peacekeepers.
1999 In Egypt, 19 people were killed when a bus plunged into a Nile canal.
1999 Bertrand Piccard and Brian Jones began their attempt to circumnavigate the Earth in a hot air balloon non-stop. They succeeded on March 20, 1999.