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FILE - In this Jan. 15, 2011 file photo, Iran's heavy water nuclear facility is backdropped by mountains near the central city of Arak, Iran. Iranian state television reported on Saturday, April, 19, 2014 that Vice President Ali Akbar Salehi has said a dispute between world powers and the country over its heavy water reactor at Arak has been “virtually resolved.” Iran and world powers are negotiating the terms of a permanent deal over its contested nuclear program. (AP Photo/ISNA, Hamid Foroutan, File)

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