1738 - A treaty between Pennsylvania and Maryland ended the Conojocular War with the settlement of a boundary dispute and an exchange of prisoners.
1787 - Delegates convened a Constitutional Convention in Philadelphia to write a new Constitution for the United States, with George Washington presiding.
1925 - John T. Scopes was indicted for teaching Charles Darwin's theory of natural selection in violation of Tennessee's Butler Act, precipitating the Scopes Trial.
1936 - The Remington Rand strike, led by the American Federation of Labor, began.
1955 - A night time F5 tornado struck the small city of Udall, Kansas, killing 80 and injuring 273, making it the deadliest tornado to ever occur in the state and the 23rd deadliest in US history.
1966 - NASA launched Explorer 32 from Cape Canaveral; its purpose was to study the Earth's upper atmosphere.
1999 - The US House of Representatives released the Cox Report which detailed China's nuclear espionage against the US over the prior two decades.
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