The US signed the Equal Pay Act to reduce the difference in pay between sexes.
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Robber John Dillinger stole $10,000 in his first robbery at a bank in New Carlisle, Ohio.
NASA's Explorer 49 was launched into Earth's orbit to research long-range radio waves within the Milky Way.
The first class of students graduated from the United States Naval Academy.
President Franklin Roosevelt became the first president to travel abroad during war.
The Opportunity Mars rover sent its last signal to Earth.
