November 21

Wednesday 21, 1979:

The United States Embassy in Islamabad, Pakistan is attacked by a mob and set afire, killing four. (see: Foreign relations of Pakistan)

Saturday 21, 1970:

A joint Air Force and Army team raids the Son Tay prison camp in an attempt to free American POWs thought to be held there (there were zero Americans killed, but the prisoners had already moved to another camp; All US POWs were moved to a handful of central prison complexes as a result of this raid).

Saturday 21, 1953:

Authorities at the British Natural History Museum announce that the skull of the "Piltdown Man", held to be one of the most famous fossil skulls in the world, was a hoax.

Wednesday 21, 1877:

Thomas Edison announces his invention of the phonograph, a machine that can record sound (this is considered to be Edison's first great invention).

Saturday 21, 1789:

North Carolina ratifies the United States Constitution and is admitted as the 12th U.S. state.