BERLIN—A young man bridges the wall between East and West Berlin, 1989




CERRO MURIANO, Spain—Federico Borrell Garcia, Spanish loyalist militiaman, collapses into death, 1936.




NORTH CAROLINA—A black man drinks at segregated water fountains, 1950




SHARPEVILLE, South Africa—Police open fire on a crowd, killing more than 70 and injuring hundreds of others during what came to be known as the Sharpeville massacre, 1960.




WASHINGTON, D.C.—At the climax of his “I Have A Dream” speech, Martin Luther King Jr. raises his arm on the steps of the Lincoln Memorial and calls out for deliverance with the electrifying words of an old Negro spiritual hymn, “Free at last! Free at last! Thank God Almighty, we are free at last!”, 1963.




ARLINGTON, Va.—Jan Rose Kasmir confronts the National Guard outside the Pentagon during the 1967 anti-Vietnam War march, 1967.




SAIGON, Vietnam—The Saigon fire department, which has the job of collecting the dead from city streets, has just placed a girl, killed by U.S. helicopter fire, in the back of their truck, where her brother finds her, 1968.




PARIS—Students hurl projectiles during the May 1968 student protest.





MEXICO—Mexicans are arrested while trying to cross the U.S. border, 1979.




TEHRAN, Iran—Veiled women learn how to shoot in the outskirts of the city, 1986.




BEIJING, China—Tiananmen Square, 1989.