1. On June 20, 1893, the first women's bicycle club in Washington, D.C., was founded. Known as the Capital Bicycle Club, the group aimed to promote cycling as a healthy and enjoyable pastime for women.

2. In 1931, American aviator Wiley Post and his navigator, Harold Gatty, landed their plane, the Winnie Mae, at Washington's Hoover Field on June 20th. They had completed the first round-the-world flight in a single-engine aircraft, covering 15,596 miles in 8 days, 15 hours, and 51 minutes.

3. On June 20, 1944, a tornado touched down in Washington, D.C., causing extensive damage and leaving 13 people dead. The tornado struck shortly after midnight, with winds estimated at up to 150 mph, and caused destruction to buildings, vehicles, and trees in its path.

4. June 20, 1963, saw thousands of civil rights activists descend on the nation's capital for the March on Washington for Jobs and Freedom. The historic event culminated in Martin Luther King Jr.'s famous "I Have a Dream" speech, delivered from the steps of the Lincoln Memorial.

5. On June 20, 2003, the first-ever game of Major League Baseball was played in Washington, D.C., since the departure of the Washington Senators in 1971. The new team, the Washington Nationals, beat the New York Mets 5-3 in front of a sell-out crowd at RFK Stadium.