President Richard Nixon died of a stroke at the age of 81.
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The German army used chlorine gas for the first time.
Adolf Hitler and Benito Mussolini met in Salzburg, Austria.
The Paris Agreement was opened for signatures.
Sir Robin Knox-Johnston completed the world's first non-stop, single-handed global circumnavigation.
Thieves stole $3.3 million from the First National Bank of Arizona in Tucson.