Article Photos: Obama summons world leaders to reject extremism



President Barack Obama addresses the 67th session of the United Nations General Assembly at the United Nations headquarters, Tuesday, Sept. 25, 2012. (AP Photo/Pablo Martinez Monsivais)

President Barack Obama addresses the 67th session of the United Nations General Assembly at the United Nations headquarters, Tuesday, Sept. 25, 2012. (AP Photo/Pablo Martinez Monsivais)