1. In 1795, the United States Congress authorized the construction of the US Capitol building in Washington, DC. The Capitol is one of the most iconic buildings in the District of Columbia and a symbol of democracy in the United States.

2. On February 7, 1962, the National Museum of American History opened its doors to the public for the first time. The museum is located on the National Mall and is home to some of the country's most important artifacts, including the original Star-Spangled Banner and the First Ladies' inaugural gowns.

3. In 1965, civil rights activist Malcolm X gave a speech at the Audubon Ballroom in Washington, DC, where he was assassinated in front of a crowd of over 400 people. His death was a major loss for the civil rights movement and sparked outrage across the country.

4. On February 7, 2015, a massive snowstorm hit the District of Columbia, dumping over 14 inches of snow in some parts of the city. The storm caused power outages and traffic delays, but also provided an opportunity for residents to enjoy the city's beautiful snow-covered scenery.

5. February 7 is also National Black HIV/AIDS Awareness Day, which aims to raise awareness about the disproportionate impact of HIV/AIDS on African American communities. The day encourages individuals to get tested and seek treatment if necessary, and promotes HIV prevention strategies such as condom use and needle exchange programs.