The United States and Russia signed the Moscow Treaty, agreeing to limit their nuclear arsenals.
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Theresa May announced her resignation as British Prime Minister.
The first telegraph message was sent.
The Westminster Bridge across The Thames opened in London, England.
Paavo Nurmi ran a world record time of 3000 meters in 8 minutes and 25 seconds.
Scott Carpenter orbited the Earth three times in the US Aurora 7.
