** FILE ** Ali Asghar Soltanieh, Iran's ambassador to the International Atomic Energy Agency (IAEA), waves on Sept. 10, 2012, as he arrives for a meeting of the IAEA board of governors at the International Center in Vienna, Austria. (Associated Press)
Yukiya Amano, head of the International Atomic Energy Agency (IAEA), addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna on Sept. 10, 2012. (Associated Press)
Ali Asghar Soltanieh (left), Iran's envoy to the International Atomic Energy Agency, talks with a foreign diplomat before the start of an expert-level meeting of the Non-Aligned Movement in Tehran on Sunday, Aug. 26, 2012. (AP Photo/Vahid Salemi)
**FILE** Ali Asghar Soltanieh, Iran's Ambassador to the International Atomic Energy Agency (IAEA), waves May 14, 2012, as he arrives for talks with the IAEA at the permanent mission of Iran in Vienna. (Associated Press)
Yukiya Amano (center), director general of the International Atomic Energy Agency (IAEA), speaks to the media at Vienna International Airport near Schwechat, Austria, on Tuesday, May 22, 2012, after returning from Iran. (AP Photo/Ronald Zak)
Yukiya Amano (left), chief of the International Atomic Energy Agency, met with Iran's top nuclear negotiator, Saeed Jalili (right), on Monday in Tehran, hoping to get the OK to resume inspections of the Islamic republic's nuclear sites. (Associated Press)
International Atomic Energy Agency (IAEA) chief Yukiya Amano (left) talks with reporters during a news briefing at the conclusion of his meeting with Iran's top nuclear negotiator, Saeed Jalili (right), in Tehran on Monday, May 21, 2012. (AP Photo/IRNA, Adel Pazzyar)
Yukiya Amano, director general of the International Atomic Energy Agency (IAEA), speaks to the media at the Vienna International Airport near Schwechat, Austria, on Sunday, May 20, 2012, before his flight to Tehran. (AP Photo/Ronald Zak)
Ali Asghar Soltanieh, Iran's ambassador to the International Atomic Energy Agency (IAEA), is surrounded by media upon arriving March 7, 2012, at the International Center in Vienna, Austria, for the IAEA board of governors meeting. (Associated Press)
Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan casts a shadow on the wall during a news conference after a meeting of the IAEA's board of governors at the International Center, in Vienna, Austria, Monday, March 5, 2012. (AP Photo/Ronald Zak)