This photo is from the Birmingham campaign, which was a strategic movement organized by the Southern Christian Leadership Conference. The campaign took place in the spring of 1963 and culminated in widely publicized confrontations between black youth and white civic authorities. Led by Martin Luther King, Jr., organizers used nonviolent direct action to defy laws they considered unfair.
The photo shows Parker High School student Walter Gadsden being attacked by police dogs. It was taken by photographer Bill Hudson and was published in The New York Times on May 4, 1963. — in Birmingham, AL.