1. On November 21, 1906, the African American Citizens' Protective League held a mass meeting at the Metropolitan Baptist Church to discuss the issue of police brutality towards Black residents in the city. The meeting resulted in the formation of a committee to investigate and report on cases of police misconduct.

2. In 1975, the Washington D.C. City Council passed a resolution recognizing November 21 as "Vietnam Veterans Day" in honor of the sacrifices and contributions of D.C. residents who served in the Vietnam War.

3. On November 21, 1927, the Women's National Press Club held its first annual book fair, featuring works by female authors and illustrators. The event was a success and became an annual tradition, attracting visitors from across the country.

4. On November 21, 1934, President Franklin D. Roosevelt signed the Indian Reorganization Act, which aimed to reverse the negative effects of previous policies on Native American tribes and promote self-governance and economic development.

5. In 1963, civil rights leader and Baptist minister Dr. Martin Luther King Jr. delivered a speech at the Lincoln Memorial in Washington D.C., calling for an end to segregation and racial discrimination. The speech, known as the "I Have a Dream" speech, is widely considered one of the greatest speeches in American history.