Today:
1. 1792: The Postal Service Act was signed by President George Washington, establishing the United States Postal Service.
2. 1839: Congress prohibited dueling in the District of Columbia.
3. 1872: The Metropolitan Museum of Art opened in New York City.
4. 1933: The U.S. Congress proposed the 21st Amendment to the Constitution, which would later repeal Prohibition.
5. 1962: John Glenn became the first American to orbit the Earth as he piloted the Friendship 7 spacecraft.