The Rev. Martin Luther King Jr.'s "I Have a Dream" speech, delivered on the steps of the Lincoln Memorial in 1963, is so famous that it often eclipses his other speeches. King's greatest contribution ...

The Rev. Martin Luther King Jr., 1956, Smithsonian's National Museum of American History In this photo, the Rev. Martin Luther King Jr. speaks at Rankin Chapel at Howard University in Washington, D.C.

Martin Luther King Jr.'s iconic 1963 "I Have a Dream" speech is well known, but there are several other key speeches that also resonate as historical signposts of the Civil Rights Movement.

Martin Luther King Jr.'s iconic 1963 "I Have a Dream" speech is well known, but there are several other key speeches that also resonate as... The Rev. Martin Luther King Jr.'s "I Have a Dream" speech, ...