Herman Nackaerts of the International Atomic Energy Agency,IAEA, Deputy Director General and Head of the Department of Safeguards, arrives for his flight to Iran at Vienna's Schwechat airport, Austria, on Saturday, Jan. 28, 2012. (AP Photo/Ronald Zak)

Associated Press
Herman Nackaerts of the International Atomic Energy Agency,IAEA, Deputy Director General and Head of the Department of Safeguards, arrives for his flight to Iran at Vienna's Schwechat airport, Austria, on Saturday, Jan. 28, 2012. (AP Photo/Ronald Zak)
Herman Nackaerts of the International Atomic Energy Agency,IAEA, Deputy Director General and Head of the Department of Safeguards, arrives for his flight to Iran at Vienna's Schwechat airport, Austria, on Saturday, Jan. 28, 2012. (AP Photo/Ronald Zak)
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