Iran's deputy Foreign Minister Abbas Araghchi, right, and Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano shake hands next to IAEA deputy director general Tero Tapio Varjoranta, left, and Iran's Ambassador to the International Atomic Energy Agency, IAEA, Reza Najafi, right, prior a meeting at the International Center in Vienna, Austria on Monday, Oct. 28, 2013. The meeting was held before agency experts meet Iranian diplomats in a renewed push to probe suspicions that Tehran worked on nuclear arms. (AP Photo/Hans Punz)
The Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna Austria, Monday, March 4, 2013. (AP Photo/Ronald Zak)
Herman Nackaerts, deputy director general and head of the Department of Safeguards of the International Atomic Energy Agency (IAEA), waves as he arrives from Iran at Schwechat Airport in Vienna, Austria, on Dec. 14, 2012. (Associated Press)
Fereidoun Abbasi-Davani, Iran's nuclear chief, delivers a speech on Monday, Sept. 17, 2012, at the general conference of the International Atomic Energy Agency at the International Center in Vienna, Austria. (Associated Press)
Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center, in Vienna, Austria, Monday, Sept. 10, 2012. (AP Photo/Ronald Zak)