On this day in 1940, during World War II, following the German defeat in the Battle of Britain, Hitler postponed Operation Sea Lion indefinitely.
On this day in 1961, the world's first retractable-dome stadium, the Civic Arena, opened in Pittsburgh, Pennsylvania.
On this day in 1976, the first Space Shuttle, Enterprise, was unveiled by NASA.
On this day in 1983, Vanessa Williams became the first black Miss America.
And on this day in 2001, the New York Stock Exchange reopened for trading after the September 11 attacks, the longest closure since the Great Depression.