1. In 1813, the County of Washington in the District of Columbia was officially dissolved by Congress. It was created in 1801 to encompass the newly established federal district, but was deemed unnecessary and was absorbed into Washington City (now the District of Columbia).

2. On December 30, 1922, the District of Columbia's first electric streetcars were put into service. The cars were manufactured by the Brill Co. of Philadelphia and were operated by Capital Traction Company. They replaced the earlier horse-drawn streetcars and played an important role in the city's transportation system for over four decades.

3. In 1934, the United States government authorized the establishment of the National Guard Bureau in the District of Columbia. It serves as the primary channel of communication between the National Guard and the Department of Defense, and is responsible for administering all federal funding and policies related to the Guard.

4. On this day in 1974, the Washington Post published an article revealing that President Nixon had authorized the payment of hush money to the Watergate burglars. This revelation significantly fueled the impeachment proceedings against Nixon, which ultimately led to his resignation less than a year later.

5. In 2013, the District of Columbia became the first jurisdiction in the United States to legalize the use of marijuana for recreational purposes. The law allowed residents over the age of 21 to possess up to two ounces of marijuana and to grow up to six plants at home. The sale of recreational marijuana was still illegal, however, until the passage of additional legislation in 2019.