The mapping of Mars’ surface began.
Mariner 9 started mapping over 85% of the surface area of Mars on this day.
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Mercurius became Pope John II, making him the first pope to change their name after attaining popehood.
The World Health Organization (WHO) announced that gaming addiction is a Mental Health Disorder.
The US & Canada agreed to divert the Niagara River to protect the Niagara Falls from eroding.
Democratic Senator John F. Kennedy gave a speech announcing that he was running for US President.
The Duquesne Spy Ring, a Nazi German espionage network, was sentenced to prison.
