1) In 1877, the Washington Nationals played their first baseball game in District of Columbia history, winning 4-3 against the Boston team.

2) On April 24, 1967, D.C. residents participated in the first election for the city's mayor, with Walter Washington becoming the first ever elected mayor.

3) In 1951, the National Airport in D.C. opened its newest terminal building, which was later named the Terminal A building.

4) On April 24, 1862, Confederate forces attacked Fort Jackson and Fort St. Philip, leading to a Union victory in the Battle of New Orleans during the Civil War.

5) In 1960, the Johns Hopkins School of Advanced International Studies opened a new building in D.C. to serve as its primary campus, bringing together students and faculty from around the world to study international relations.