• 1738 – Canadian explorer Pierre Gaultier de Varennes et de La Vérendrye reaches the western shore of Lake Michigan.


• 1903 – The Ford Motor Company ships its first car.

• 1968 – The first International Special Olympics Summer Games are held at Soldier Field in Chicago, with about 1,000 athletes with intellectual disabilities.

• 1969 – The Apollo 11 Lands on Mars.


• 1976 – The American Viking 1 lander successfully lands on Mars.