Selma police arresting peaceful marchers during their first attempt to march from Selma to Montgomery, March 7, 1965. Alabama Sovereignty Commission, Administrative files, SG13843, folder 8, Alabama Department of Archives and History, Montgomery, Alabama.

SNCC chairman John Lewis being beaten by police/possemen on Bloody Sunday. Lewis suffered a skull fracture. Library of Congress, Prints and Photographs Division, New York World-Telegram & Sun Collection [LC-USZ62-127732].

Twelve civil rights protestors stage a sit-in demonstration at the White House in an attempt to speak to the President about the events in Selma, March 11, 1965. LBJ Library photo by Cecil Stoughton [80-12-WH65].

Marchers in Harlem carry a banner declaring solidarity with the marchers in Selma, March 15, 1965. New York World-Telegram & Sun photo by Stanley Wolfson. Library of Congress, Prints and Photographs Division [LC-USZ62-135695].

Man carries a sign telling President Johnson to go to Selma, March 15, 1965. New York World-Telegram & Sun photo by Stanley Wolfson. Library of Congress, Prints and Photographs Division [LC-USZ62-135697].

President Lyndon B. Johnson at the speaker's podium addressing a Joint Session of Congress urging the passage of the Voting Rights Act. March 15, 1965. LBJ Library photo by Cecil Stoughton. [C106-3-WH65 ].

Participants, some carrying American flags, marching in the civil rights march from Selma to Montgomery, Alabama in 1965. Photo by Petter Pettus, 1965. Library of Congress, Prints and Photographs Division [LC-USZ62-133090].

Marchers in Harlem carry a banner declaring solidarity with the marchers in Selma, March 15, 1965. New York World-Telegram & Sun photo by Stanley Wolfson. Library of Congress, Prints and Photographs Division [LC-USZ62-135695].

Marchers including Dr. Ralph David Abernathy, his wife Juanita Abernathy, and their children. Photo released courtesy of Abernathy family.

President Lyndon B. Johnson (right) speaking with civil rights activists, including John Lewis and James Farmer (third and fourth from left) August 6, 1965. LBJ Library photo by Yoichi Okamoto [A1031-21a].

President Lyndon B. Johnson signs the Voting Rights Act, August 6, 1965. LBJ Library photo by Robert Knudsen [342-22a-WH65].

At the ceremony for the signing of the Voting Rights Act, President Lyndon B. Johnson moves to shake hands with Dr. Martin Luther King Jr. August 6, 1965. LBJ Library photo by Yoichi Okamoto [A1030-17a].

Edmund Pettus Bridge, Selma, Alabama, site of the 'Bloody Sunday' attack on peaceful marchers on March 7, 1965. Photo by Carol M. Highsmith. The George F. Landegger Collection of Alabama Photographs in Carol M. Highsmith's America, Library of Congress, Prints and Photographs Division [LC-DIG-highsm-07326].

On the 45th anniversary of the Selma to Montgomery March, Jesse Jackson, Winnie Mandela, and others walked across the Edmund Pettus Bridge to recreate the event. Photo by Carol M. Highsmith, March 7, 2010. The George F. Landegger Collection of Alabama Photographs in Carol M. Highsmith's America, Library of Congress, Prints and Photographs Division [LC-DIG-highsm-05942].