What day of the week is...

Today is July 21st, 2017 and is a Friday.

On this day in....

2011: NASA's Space Shuttle program ends with the landing of Space Shuttle Atlantis on mission STS-135.

1995: Third Taiwan Strait Crisis: The People's Liberation Army begins firing missiles into the waters north of Taiwan.

1983: The world's lowest temperature in an inhabited location is recorded at Vostok Station, Antarctica at .

1977: The start of the four day long Libyan–Egyptian War.

1973: In the Lillehammer affair in Norway, Israeli Mossad agents kill a waiter whom they mistakenly thought was involved in the 1972 Munich Olympics Massacre.