The Arak heavy water nuclear facilities, near the central city of Arak, 150 miles (250 kilometers) southwest of the capital Tehran, Iran, Jan. 15, 2011. On Monday, Nov. 29, 2021, negotiators are gathering in Vienna to resume efforts to revive Iran's 2015 nuclear deal with world powers, with hopes of quick progress muted after the arrival of a hard-line new government in Tehran led to a more than five-month hiatus. (AP Photo/ISNA, Hamid Foroutan, File)
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