On this day in 1918, women enlisted in the United States Marine Corps for the first time. Opha Mae Johnson was the first woman to enlist.
On this day in 1961, East Germany closed the border between the eastern and western sectors of Berlin to thwart its inhabitants' attempts to escape to the West.
And on this day in 1969, the Apollo 11 astronauts were released from a three-week quarantine to enjoy a ticker tape parade in New York.