The Chernobyl power plant in Ukraine exploded, killing 31 people and spreading contamination across Western Europe.
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The official secret police force of Nazi Germany, the Gestapo, was established.
Ariel 1, the first British-American satellite, was launched from Cape Canaveral in Florida, US.
The Treaty of London was signed by Italy, Britain, France, and Russia.
A Texas resident narrowly avoided a felony after forgetting to return a VHS rental tape after 22 years.
A meteorite shower caused thousands of meteor fragments to fall in L'Aigle, France.
