NASA’s Explorer 49 was launched into Earth’s orbit to research long-range radio waves within the Milky Way.
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Swedish authorities finally closed a 34-year-old inquiry into the murder of their prime minister.
President Franklin Roosevelt became the first president to travel abroad during war.
Innocent Bridget Bishop was the first person to be trialed and hung for witchcraft in Massachusetts, US.
The US signed the Equal Pay Act to reduce the difference in pay between sexes.
Alcoholics Anonymous was founded in Akron, Ohio.
