In Haiti, an Argentinean U.N. doctor carries a sick baby to a helicopter, to be taken to Port-au-Prince for treatment. The photo is part of a gallery honoring World Humanitarian Day. UN Photo/Marco Dormino/Marco Dormino hide caption

itoggle caption UN Photo/Marco Dormino/Marco Dormino

Delegates to the United Nations General Assembly applaud the passage of the first U.N. treaty regulating the international arms trade on Tuesday. Timothy A. Clary /AFP/Getty Images hide caption

itoggle caption Timothy A. Clary /AFP/Getty Images

A boy in Lima, Peru, receives a hepatitis B vaccine during an immunization drive in 2008. The United Nations is considering a ban on the preservative thimerosal, which is often used in hepatitis B and other vaccines in developing countries. Martin Mejia/AP hide caption

itoggle caption Martin Mejia/AP

Climate activists at a rally in Doha on December 1, 2012. Karim Jaafar/AFP/Getty Images hide caption

itoggle caption Karim Jaafar/AFP/Getty Images

In the southern West Bank city of Hebron today, supporters of Palestinian leader Mahmud Abbas gathered in anticipation of today's vote at the U.N. Hazem Bader /AFP/Getty Images hide caption

itoggle caption Hazem Bader /AFP/Getty Images

At the U.N. today, Israeli Prime Minister Benjamin Netanyahu used a graphic to show how far he says Iran will be by mid-2013 in a quest to develop nuclear weapons. He drew the red line to mark where he says Iran must be stopped. Lucas Jackson /Reuters /Landov hide caption

itoggle caption Lucas Jackson /Reuters /Landov

Iranian President Mahmoud Ahmadinejad during his address today at the U.N. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images

A Haitian protester in Port-au-Prince last year spray-paints a wall, equating the UN mission in Haiti (abbreviated here as MINISTA) with cholera. Thony Belizaire/AFP/Getty Images hide caption

itoggle caption Thony Belizaire/AFP/Getty Images