Martin Luther King, Jr. adviser and speechwriter Clarence B. Jones talks to WSJ's Monika Vosough about how Martin Luther King's favorite gospel singer Mahalia Jackson helped create the "I Have a Dream" speech.
Martin Luther King, Jr. adviser and speechwriter Clarence B. Jones talks to WSJ's Monika Vosough about how Martin Luther King's favorite gospel singer Mahalia Jackson helped create the "I Have a Dream" speech.