1787 – Constitutional Convention in Philadelphia begins debate on the first draft of the Constitution.
1819 – Norwich University is founded in Vermont as the first private military school in the United States.
1890 – At Auburn Prison in New York, murderer William Kemmler becomes first person to be executed by electric chair.
1914 – Denis Patrick Dowd, Jr. enlists in the French Foreign Legion, becoming the first American to fight in World War 1.
1926 – Warner Bros premieres Vitaphone sound-on-disc movie system (NY)
1937 – US and USSR sign trade treaty.
1939 – 1st broadcast of “Dinah Shore Show” on NBC-radio.
1943 – US 1st Infantry division occupies node Troina Sicily.
1945 – Atomic bomb dropped on Hiroshima by the US B-29 Superfortress “Enola Gay”
1946 – US officially submits to jurisdiction of World Court.
1952 – St. Louis Browns veteran pitcher Satchel Paige, 46, becomes oldest pitcher to win a complete shutout, 1-0 v Detroit Tigers in 12 innings.
1956 – After going bankrupt in 1955, the American broadcaster Dumont Television Network makes ifs final broadcast, a boxing match from St. Nicholas Arena.
1961 – 1st case of motion sickness in space reported.
1965 – US President Lyndon B. Johnson signs the Voting Rights Act prohibiting voting discrimination against minorities.
1978 – PGA Championship, Oakmont CC: John Mahaffey recovers from 7 down with 14 to play to force playoff; beats Tom Watson & Jerry Pate on 2nd hole.
1984 – 203.05 million shares traded on NY Stock Exchange.
1989 – “Oh! Calcutta!” closes at Edison Theater NYC after 5959 performances.
1991 – Tim Berners-Lee releases filed describing his idea for the World Wide Web. WWW debuts as a publicly available service on the Internet.
1996 – US President Bill Clinton signs a new bill imposing sanctions on non-US companies which invest over $40 million a year in the energy sectors of Iran or Libya.
1997 – Microsoft announces it will invest $150 million in Apple Computer, Inc.
2006 – Tiger Woods (30) becomes the youngest player to compile 50 PGA Tour wins with a 3 stroke victory in the Buick Open at Grand Blanc, Michigan.
2015 – Republican Presidential nomination race begins with debate between 7 lesser ranked candidates in Cleveland, Ohio.