U.N. General Assembly

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U.S. Secretary of State Hillary Rodham Clinton (left) and Susan Rice, U.S. ambassador to United Nations, listen as President Obama addresses the 67th session of the U.N. General Assembly at the world body's headquarters on Tuesday, Sept. 25, 2012. (AP Photo/Mary Altaffer)

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Palestinian President Mahmoud Abbas leaves the podium after speaking during the 67th session of the U.N. General Assembly at the world body's headquarters on Thursday, Sept. 27, 2012. (AP Photo/Seth Wenig)

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Israeli Prime Minister Benjamin Netanyahu addresses the 67th session of the U.N. General Assembly on Thursday, Sept. 27, 2012. (AP Photo/Richard Drew)

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Palestinian President Mahmoud Abbas addresses the 67th session of the U.N. General Assembly at the world body's headquarters on Thursday, Sept. 27, 2012. (AP Photo/Richard Drew)

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Iranian President Mahmoud Ahmadinejad addresses the 67th session of the U.N. General Assembly at the world body's headquarters on Wednesday, Sept. 26, 2012. (AP Photo/Jason DeCrow)

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British Prime Minister David Cameron will appear on “Late Show With David Letterman” while he is in New York to speak to the U.N. General Assembly. (Associated Press)

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** FILE ** President Obama addresses the U.N. General Assembly on Wednesday, Sept. 21, 2011. (AP Photo/Pablo Martinez Monsivais)

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In this photo from Sept. 23, 2009, Libyan leader Col. Moammar Gadhafi shows a torn copy of the United Nations Charter during his address to the 64th session of the U.N. General Assembly. (Associated Press)

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** FILE ** Iranian President Mahmoud Ahmadinejad speaks during the 66th session of the U.N. General Assembly at the world body's headquarters in New York on Thursday, Sept. 22, 2011. (AP Photo/Andrew Burton)

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French President Nicolas Sarkozy (left) and Palestinian Authority President Mahmoud Abbas meet Tuesday at a New York hotel during the U.N. General Assembly session. Mr. Sarkozy has proposed a one-year timetable for establishing a Palestinian state. (Associated Press)

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** FILE ** President Obama addresses the U.N. General Assembly at the United Nations headquarters on Wednesday, Sept. 21, 2011. (AP Photo/Pablo Martinez Monsivais)