1. In 1933, Franklin D. Roosevelt is inaugurated as the 32nd President of the United States in Washington, D.C. Roosevelt came into office during the height of the Great Depression and went on to lead the country through some of its most challenging times.

2. In 1947, Mahatma Gandhi's assassination occurs in New Delhi, India. Although the event took place in another country, it had a significant impact on the District of Columbia, as many of the city's residents were deeply moved by the loss of this iconic figure.

3. In 1972, the Washington Post breaks the news of the Watergate scandal, which would eventually lead to the resignation of President Richard Nixon. The Post's reporting on the scandal helped to uncover widespread corruption and illegal activities within the Nixon administration.

4. In 1994, the American Heritage River Initiative is launched by President Bill Clinton. The program aimed to promote environmental conservation and economic development along several designated rivers across the country, including the Anacostia River in Washington, D.C.

5. In 2017, a massive Women's March takes place in Washington, D.C. and around the world, in response to the inauguration of President Donald Trump. The event drew an estimated 500,000 people to the nation's capital and became one of the largest single-day protests in U.S. history.