In 1918, abdicated Czar Nicholas II, his family and staff were executed by Bolsheviks at Yekaterinburg, Russia.
In 1945, President Harry S. Truman, Soviet Premier Josef Stalin and British Prime Minister Winston Churchill met at the Potsdam Conference in Germany.
In 1955, Disneyland opened in Anaheim, California.
In 1975, a U.S. Apollo spacecraft docked with a Soviet Soyuz spacecraft, and astronauts f…