epa03963621 EU High Representative for Foreign Affairs and Security Policy Catherine Ashton (C) poses next to Iranian Foreign Minister Mohammad-Javad Zarif (3-R)and the Iranian delegation after a ceremony at the United Nations in Geneva, Switzerland, Sunday, November 24, 2013. Iran and six world powers on 24 November agrreed to a deal that limits its nuclear programme, achieving the first diplomatic breakthrough since Tehran’s secret nuclear activities came to light 10 years ago. The initial agreement will be valid for six months, while the group of Britain, China, France, Russia, the US and Germany aim to reach a more comprehensive agreement with Tehran. EPA/MARTIAL TREZZINI