The Westminster Bridge across The Thames opened in London, England.
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President Arthur and NY Governor Cleveland opened the Brooklyn Bridge.
The United States and Russia signed the Moscow Treaty, agreeing to limit their nuclear arsenals.
Lugano, Switzerland, hosted the first Eurovision Song Contest.
Theresa May announced her resignation as British Prime Minister.
Paavo Nurmi ran a world record time of 3000 meters in 8 minutes and 25 seconds.
