© Lewis Hine

Early child labor at a U.S. cotton mill, 1909. Some boys and girls were so small that they had to climb up to the spinning frame to work on broken threads and empty bobbins. Bibb Mill No. 1, Macon, Ga.

© Peter Turnley/Corbis

The Sunday before victory, Columbus, Ohio, Nov. 2, 2008.

Kristen Ashburn's book on AIDS in Southern Africa, I AM BECAUSE WE ARE.

© W. Eugene Smith/Black Star

Iconic war photograph of a U.S. soldier holding a dying infant in the Saipan mountains, 1944.

© Sean Gallagher Photography

Widespread unemployment in Mongolia has caused many social problems such as depression, alcohol abuse, domestic violence and crime. Otguntugs, 28, and his wife Ounsuren, 36, use what money they have from collecting bottles to purchase cheap Russian vodka which they drink in order to stave off the bitter cold that embraces Ulaanbaatar for large portions of the year.

© Justin Mott/Bloomberg News

Even though their district of Hanoi, Vietnam, was flooded, people wanted to pose or wave at me, Nov. 4, 2008.