American photographer Warren K. Leffler was a photographer for U.S. News & World Report during the years of the civil rights movement. Although based primarily in Washington, D.C., Leffler also traveled to the South to cover many of the main events for the magazine.
https://www.worldpressphoto.org/people/warren-k-leffler
Warren K Leffler, "They're Pouring In From All Over.", Digital print of black and white photograph, Overall: 12 1/2 x 15 x 1 1/4 in. (31.8 x 38.1 x 3.2 cm), Collection of Art in Embassies, Washington, D.C.; Library of Congress Library of Congress Prints and Photographs Division, U.S. News & World Report Magazine Photograph Collection; LC-DIG-ppmsca-03129
Warren K Leffler, Martin Luther King, Jr. after meeting with President Johnson at the White House to discuss Civil Rights, December 3, 1963, Black and white photographic print, Overall: 13 x 16 x 1 in. (33 x 40.6 x 2.5 cm), Collection of Art in Embassies, Washington, D.C.; Library of Congress Prints and Photographs Division, LC-U9-10978-A-3
Warren K Leffler, Civil Rights March on Washington, D.C., Digital print of black and white photograph, Overall: 15 x 12 1/2 x 1 1/4 in. (38.1 x 31.8 x 3.2 cm), Collection of Art in Embassies, Washington, D.C.; Library of Congress Prints and Photographs Division, U.S. News & World Report Magazine Photograph Collection; LC-DIG-ppmsca-03130