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

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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

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Martin Mejia/AP

Doctors Argue Against Proposed Ban On Vaccine Preservative

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

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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

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Hazem Bader /AFP/Getty Images

NPR's Philip Reeves, reporting on 'Morning Edition'

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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

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Lucas Jackson /Reuters /Landov

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

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On 'Morning Edition': NPR's Michele Kelemen previews Day II at the U.N.

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On 'Morning Edition': Steve Inskeep speaks with Robert Malley

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China And Russia Veto U.N. Resolution Threatening Sanctions On Syria

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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

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Thony Belizaire/AFP/Getty Images

A Free Syrian Army fighter fires his weapon during clashes with Syrian troops near Idlib, Syria, on Friday. The U.N. said Saturday it is suspending its mission in Syria because of escalating violence. Anonymous/AP hide caption

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Anonymous/AP