1. April 28, 1862: The Battle of Rappahannock River
On April 28, 1862, Union forces under General Irvin McDowell engaged Confederate troops in the Battle of Rappahannock River. The battle took place near the town of Rappahannock Station in Virginia, just south of the District of Columbia. Despite heavy losses on both sides, the Union was victorious and was able to maintain control of the area.

2. April 28, 1942: The DC Teen Curfew
On April 28, 1942, the District of Columbia implemented a teenage curfew in an effort to prevent juvenile delinquency. The curfew required all youths under the age of 18 to be off the streets and in their homes by 10pm on weekdays and midnight on weekends. The curfew remained in effect until it was struck down by the Supreme Court in 1964.

3. April 28, 1971: The Beatles' "Let It Be" Premiere
On April 28, 1971, the documentary "Let It Be," which chronicled the making of the Beatles' album of the same name, premiered in Washington, D.C. The event was attended by many prominent figures in the music industry, including John Lennon and Yoko Ono. The film went on to win an Academy Award for Best Original Song Score.

4. April 28, 1986: The Diplomatic Security Service Shooting
On April 28, 1986, a gunman opened fire at the U.S. Department of State's Diplomatic Security Service headquarters in Rosslyn, Virginia, just across the Potomac River from the District of Columbia. Three people were killed and three others were injured in the attack. The shooter was captured and later sentenced to life in prison.

5. April 28, 2018: The White House Correspondents' Dinner
On April 28, 2018, the annual White House Correspondents' Dinner was held in Washington, D.C. The event, which brings together journalists, politicians, and celebrities, was hosted by comedian Michelle Wolf. Wolf's monologue, which included controversial jokes about President Trump and his administration, drew criticism from some attendees and the White House.