Iran's heavy-water nuclear facilities near the central city of Arak, 150 miles southwest of Tehran, is pictured on Saturday, Jan. 15, 2011. (AP Photo/ISNA, Hamid Foroutan) ** FILE **

Photo by: Hamid Foroutan

Iran's heavy-water nuclear facilities near the central city of Arak, 150 miles southwest of Tehran, is pictured on Saturday, Jan. 15, 2011. (AP Photo/ISNA, Hamid Foroutan) ** FILE **