A member of Rio de Janeiro's Social Work Department speaks with crack addicts in a slum area known as "Crackland," during a police operation in the city in November. Christophe Simon /AFP/Getty Images hide caption

itoggle caption Christophe Simon /AFP/Getty Images

Pakistanis welcome Muhammad Shahid Nazir, center, the singer of "One Pound Fish," at Lahore's airport Thursday. Hamza Ali/AP hide caption

itoggle caption Hamza Ali/AP

Gul Mohammed Khan has lost three sons in sectarian violence during the last two years, in Karachi, Pakistan. He stands here with some of his grandchildren who have lost their fathers. When he looks at his grandchildren, he says, he sees his sons. Dina Temple-Raston/NPR hide caption

itoggle caption Dina Temple-Raston/NPR

Congolese women wait for food to be distributed at the Mugunga III camp for displaced people outside the eastern town of Goma on Dec. 2. Jerome Delay/AP hide caption

itoggle caption Jerome Delay/AP

Ringing in the New Year in Spain requires eating a dozen grapes and wearing a very specific kind of undergarment. Jeff Koehler hide caption

itoggle caption Jeff Koehler