U.S. alternate permanent representative to the International Atomic Energy Agency (IAEA) ambassador Robert Wood attends a board of governors meeting at the United Nations headquarters in Vienna March 5, 2012. The director general of the IAEA, Yukiya Amano said on Monday his organisation could not be sure that Iran's nuclear programme did not have military aims. REUTERS/Herwig Prammer (AUSTRIA - Tags: POLITICS ENERGY HEADSHOT)