British Foreign Secretary William Hague, Germany’s Foreign Minister Guido Westerwelle, EU High Representative for Foreign Affairs and Security Policy Catherine Ashton, Iranian Foreign Minister Mohammad-Javad Zarif, Chinese Foreign Minister Wang Yi, U.S. Secretary of State John Kerry, Russian Foreign Minister Sergey Lavrov, French Foreign Minister Laurent Fabius, delivers a statement during a ceremony at the United Nations in Geneva, Switzerland, Sunday, November 24, 2013. Iran and six world powers reached a breakthrough agreement early on Sunday to curb Tehran’s nuclear programme in exchange for limited sanctions relief, in a first step towards resolving a dangerous decade-old standoff. (KEYSTONE/Martial Trezzini)