1807

The Act Prohibiting Importation of Slaves was signed by President Thomas Jefferson. (The domestic trade of enslaved people was not affected.)

1861

The state of Texas was admitted to the Confederacy.

1962

Wilt Chamberlain scored 100 points for the Philadelphia Warriors against the New York Knicks, a single-game NBA record that still stands. Philadelphia won, 169-147.

1985

The U.S. government approved a screening test for AIDS that detected antibodies to the virus, allowing possibly contaminated blood to be excluded from the blood supply.