Interview with American political activist and author Angela Davis in prison in Marin County Jail. Prison interview with activist Angela Davis on January 01, 1971 in California (Footage by Getty Images)

/ Police in park, people drinking from water fountains / families and crowds. Crowds at the March on Washington on August 28, 1963 in Washington, DC (Footage by Getty Images)

/ A Philip Randolph saying that, 'Negroes want the same things that white citizens possess - they want complete equality, social, economic, and political. A. Philip Randolph speaking about civil rights equality on January 01, 1963 ...

/ CU man standing under umbrella in the rain on the Washington Mall / preparations for security are made, man holding walkie talkie / CU of African American men's faces. Organizers prepare for the March on Washington on August 27, 1963...

/ buses on their way at night to the March on Washington. Buses traveling to the March on Washington on August 27, 1963 in Washington, DC (Footage by Getty Images)

JFK and LBJ meet with Roy Wilkins, Asa Philip Randolph, MLK, Walter Reuther and others at White House and pose for the press.

Front line of march includes Roy Wilkins, Asa Philip Randolph, Martin Luther King, Jr, and Walter Reuther, head of auto workers.

PAN of huge crowd / organizers lined up, holding signs.

Multiple view fly over of the US Constitution. Just split and overlay then add blending modes, dissolves, filters, etc to taste!

Crowds of Latino protesters in a farm worker demonstration march / people march down street raising their fists, chanting and carrying various flags and placard signs inscribed with such slogans as 'Chicano power', 'viva la raza', in...

Civil rights march, which became riot resulting in death of 14 catholic people / Close shot of soldier firing live rounds behind armoured vehicle, shots heard / Troops firing, British military commander's voice heard 'Do not fire back...

Exterior of Beulah Baptist Church / congregants entering / Martin Luther King speaking from podium / students in audience applauding, singing (no audio)

walks through UNHCR Refugee camp Mugunga 3 Young refugee child at Mugunga 3 Refugee Camp on July 04, 2012 in Goma, Democratic Republic of Congo (Footage by Getty Images)

Westboro Baptist Church Protests Gay Marriage at Supreme Court on March 27, 2013 in Washington, DC (Footage by Getty Images)

Gay Marriage Supporters Rally Against DOMA at Supreme Court on March 27, 2013 in Washington, DC (Footage by Getty Images)

Gay Marriage Supporters Rally Against DOMA at Supreme Court on March 27, 2013 in Washington, DC (Footage by Getty Images)

Gay Marriage Supporters Rally Against DOMA at Supreme Court on March 27, 2013 in Washington, DC (Footage by Getty Images)

Gay Marriage Supporters Rally Against DOMA at Supreme Court on March 27, 2013 in Washington, DC (Footage by Getty Images)

Gay Marriage Supporters Rally Against DOMA at Supreme Court on March 27, 2013 in Washington, DC (Footage by Getty Images)

Gay Marriage Supporters Rally Against DOMA at Supreme Court on March 27, 2013 in Washington, DC (Footage by Getty Images)