Iran's nuclear chief and acting foreign minister, Ali Akbar Salehi (second from left) gestures as he talks to a group of foreign diplomats through snowfall during their visit to the Iran's heavy water nuclear facilities near the central city of Arak on Saturday. Ali Asghar Soltanieh, Iran's envoy to the U.N.'s International Atomic Energy Agency, walks at second right. (Associated Press/ISNA, Hamid Foroutan)
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