The first 1,000 Royal Air force bomber raid dropped 38 thousand tons of bombs on Cologne, Germany.
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SpaceX's Crew Dragon Demo-2 launched from the Kennedy Space Center in Florida.
Andrew Jackson killed Charles Dickinson in a duel.
Joan of Arc was burned at the stake.
The US Mariner 9 was launched – it went on to become the first satellite to orbit Mars.
Spain officially became the 16th member of NATO.
