Iranian Foreign Minister Mohammad Javad-Zarif (C) arrives at the Palace of Nations, the venue hosting talks on Iranian nuclear program, in Geneva, Switzerland, Nov. 20, 2013. Talks between five permanent members of the United Nations Security Council and Germany and Iran over its controversial nuclear program resumed Wednesday. (Xinhua/Wang Siwei)

EU High Representative for Foreign Affairs and Security Policy Catherine Ashton (L) meets with Iranian Foreign Minister Mohammad Javad-Zarif at the Palace of Nations, the venue hosting talks on Iranian nuclear program, in Geneva, Switzerland, Nov. 20, 2013. Talks between five permanent members of the United Nations Security Council and Germany and Iran over its controversial nuclear program resumed Wednesday. (Xinhua/Wang Siwei)