Haitians protest against United Nations peacekeepers in Port-au-Prince in 2010. Hector Retamal/AFP/Getty Images hide caption

itoggle caption Hector Retamal/AFP/Getty Images

Iranian President Hasan Rouhani speaks at the United Nations on Tuesday. The U.S. and Iran are taking part in talks Thursday, looking for a possible breakthrough after years of negotiations on Iran's nuclear program. Stan Honda/AFP/Getty Images hide caption

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President Obama addresses the 68th session of the United Nations General Assembly at the United Nations in New York. Timothy Clary/AFP/Getty Images hide caption

itoggle caption Timothy Clary/AFP/Getty Images

A doctor takes an HIV test from an athlete during the 18th National Sports Festival in Lagos, Nigeria, last December. Sunday Alamba/AP hide caption

itoggle caption Sunday Alamba/AP

Near Islamabad, Pakistan, 6-year-old Jabro Mounir was arranging bricks this summer — part of his daily work at a brick-making facility. He earns a little less than $2 per day. Muhammed Muheisen/AP hide caption

itoggle caption Muhammed Muheisen/AP

Sudan's President Omar al-Bashir, who faces genocide charges, has applied for a visa to come to the U.S. for the annual United Nations General Assembly next week. The U.S. has not yet said whether he'll be allowed in the country. Mohamed Nureldin Abdallah/Reuters/Landov hide caption

itoggle caption Mohamed Nureldin Abdallah/Reuters/Landov

U.N. Secretary-General Ban Ki-moon, who received the report on Syria's chemical weapons over the weekend from professor Ake Sellstrom, expressed his "profound shock and regret" at its findings. Paulo Filgueiras/UN Photo hide caption

itoggle caption Paulo Filgueiras/UN Photo

In Washington, D.C., this week, there have been demonstrations both in favor of and against a military strike on targets in Syria. Outside the White House on Monday, supporters of Syrian President Bashar Assad waved a Syrian flag with his face on it. Jewel Samad/AFP/Getty Images hide caption

itoggle caption Jewel Samad/AFP/Getty Images

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