FILE - This Jan. 15, 2011 file photo shows Iran's heavy water nuclear facilities near the central city of Arak 150 miles (250 kilometers) southwest of Tehran. Two diplomats told The Associated Press on Monday, Nov. 21, 2016, that Iran has begun to export excess quantities of heavy water, which can be used in the process to make atomic arms, as Tehran moves to end a small but significant violation of a landmark nuclear deal. (Hamid Foroutan, ISNA, File via AP)