Photos: The legacy of Martin Luther King Jr.

American civil rights leader the Rev. Martin Luther King Jr. is best known for his role in the African-American civil rights movement and nonviolent protests. His life's work has been honored with a national holiday, schools and public buildings named after him, as well as a memorial on Independence Mall in Washington. Take a look back at the civil rights leader's defining years.

American civil rights leader the Rev. Martin Luther King Jr. is best known for his role in the African-American civil rights movement and nonviolent protests. His life's work has been honored with a national holiday, schools and public buildings named after him, as well as a memorial on Independence Mall in Washington. Take a look back at the civil rights leader's defining years.