FILE—In this photo released by the Atomic Energy Organization of Iran, technicians work at the Arak heavy water reactor's secondary circuit, as officials and media visit the site, near Arak, 150 miles (250 kilometers) southwest of the capital Tehran, Iran, Dec. 23, 2019. 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. (Atomic Energy Organization of Iran via AP, File)
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