1. On September 30, 1954, the world's first nuclear-powered submarine, the USS Nautilus, was commissioned at the Naval Shipyard in Groton, Connecticut. The Nautilus completed the first submerged journey under the North Pole in 1958.

2. In 1982, the Vietnam Veterans Memorial was dedicated in Washington, D.C. The memorial, designed by Maya Lin, features a black granite wall inscribed with the names of over 58,000 soldiers who died in the Vietnam War.

3. On September 30, 1927, Babe Ruth hit his 60th home run of the season, breaking his own record and becoming the first player in baseball history to hit that many home runs in a single season.

4. In 1791, the cornerstone for the United States Capitol building was laid in Washington, D.C. The building was designed by architect William Thornton and has been the meeting place of the United States Congress since its completion in 1800.

5. On September 30, 1962, the Seattle World's Fair closed after a six-month run. The fair, whose theme was "Century 21," showcased futuristic technologies and design concepts and was attended by over 10 million people. The Space Needle, which was built for the fair, has become an iconic symbol of Seattle.