Martin Luther King Jr was assassinated in Memphis, Tennessee in 1968 while supporting a sanitation workers strike. King had risen to become the most prominent leader and spokesperson for the American civil rights movement in the 1950s and 1960s. Through nonviolent protests and civil disobedience, King helped achieve major legal victories that dismantled racial segregation. His "I Have a Dream" speech in 1963 came to symbolize the hopes and aspirations of African Americans. King's assassination deepened racial tensions in the U.S. and sparked riots in many cities, though his message of nonviolence and racial equality continued to inspire future generations.