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.