The Nazi Party killed around 1,000 people, which became known as the “Night of Long Knives.”
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Donald Trump became the first US president to visit North Korea while meeting Kim Jong Un.
The world's first emergency telephone calls were accepted in London, UK.
The US government passed the Indian Trade and Intercourse Act.
NASA launched Intelsat VA F-11 into orbit.
The first leap second was added to the UTC time system.
