In this Thursday, Nov. 15, 2012 photo, U.S. and Afghan workers tour the inside of the Kajaki power station at the dam in Kajaki district, Helmand province, south of Kabul, Afghanistan. (AP Photo/Heidi Vogt)

Associated Press
In this Thursday, Nov. 15, 2012 photo, U.S. and Afghan workers tour the inside of the Kajaki power station at the dam in Kajaki district, Helmand province, south of Kabul, Afghanistan. (AP Photo/Heidi Vogt)
In this Thursday, Nov. 15, 2012 photo, U.S. and Afghan workers tour the inside of the Kajaki power station at the dam in Kajaki district, Helmand province, south of Kabul, Afghanistan. (AP Photo/Heidi Vogt)
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