EU High Representative for Foreign Affairs and Security Policy Catherine Ashton, center, poses next to Iranian Foreign Minister Mohammad Javad Zarif, center right, and the Iranian delegation after a ceremony at the United Nations in Geneva, Switzerland, early Sunday, Nov. 24, 2013. Iran struck a historic deal Sunday with the United States and five other world powers, agreeing to a temporary freeze of its nuclear program in the most significant agreement between Washington and Tehran in more than three decades of estrangement. (AP Photo/Keystone,Martial Trezzini)