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President Barack Obama confers with Samantha Power, left, Senior Director for Multilateral Affairs, and Susan E. Rice, U.S. Permanent Representative to the United Nations, before they attended a wreath laying ceremony at the memorial for United Nations staff killed in Iraq at the U.N. Headquarters in New York, N.Y., on Sept. 23, 2009. (Official White House photo by Pete Souza)

President Barack Obama confers with Samantha Power, left, Senior Director for Multilateral Affairs, and Susan E. Rice, U.S. Permanent Representative to the United Nations, before they attended a wreath laying ceremony at the memorial for United Nations staff killed in Iraq at the U.N. Headquarters in New York, N.Y., on Sept. 23, 2009. (Official White House photo by Pete Souza)