Protesters Rally Against the NSA Surveillance Program at McPherson Square on July 04, 2013 in Washington, DC (Footage by Getty Images)

/ march organizer, Dr Benjamin Chavis, speaking to crowds / banner saying 'Mourn Black Women Seeking White Men' / Reverend Robert Smith, Jr from Detroit speaking to crowds / marchers wearing traditional African costumes / Dr Louis...

/ Jesse Jackson speaking to crowds at Million Man March / crowd shots and reactions. Jesse Jackson giving speech at Million Man March on October 16, 1995 in Washington, DC (Footage by Getty Images)

INTERVIEW - James Norton on the film, Tom Felton, his character and other roles at the 'Belle' premiere at BFI Southbank on 5 June, 2014 in London, England.

Gugu Mbatha-Raw on London, promotions, Justin Bieber and audience reactions at the 'Belle' premiere at BFI Southbank on 5 June, 2014 in London, England.

Zoom in on civil rights wall mural to face in crowd, Derry, Londonderry, Northern Ireland

Civil rights wall mural on house Derry, Derry, Northern Ireland, pull focus

Occupy Wall Street protesters rally to try to get back into Zuccotti Park after NYPD officers kick them off the property during an early morning raid. Occupy Wall Street rallies to get into Zuccotti on November 15, 2011 in New York, New...

Title superimposed on the White House seen through barren trees, "The Camera Eye on Washington Events" / 3/9/1954: Mamie Eisenhower greets young girl scouts / photographers focus on the girls / Mamie stands with the girls, one with blond...

CLEAN: Exterior shots of person sitting next to a mural of Civil Rights activists Malcolm X and Martin Luther King Junior on 7 July 2016 in Dallas, United States.

CLEAN: Exterior shots of person sitting next to a mural of Civil Rights activists Malcolm X and Martin Luther King Junior on 7 July 2016 in Dallas, United States.

28th August 1963 Roy Wilkins and A. Philip Randolph marching with crowd / March on Washington / newsreel