Martin Luther King Jr., a reverend and civil-rights activist, was assassinated at 39. However, he inspired several movements and political changes.

Martin Luther King, Jr. (January 15, 1929-April 4, 1968) was one of the most prominent leaders of America's Civil Rights Movement in the 1950s and 60s. His words and actions have left a lasting mark on America and the world as a whole,

Monday is MLK Day, the day that celebrates the birthday of slain civil rights leader Dr. Martin Luther King Jr. The National Museum of African American History and Culture offers