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Associated Press
Signs warn against trespassing onto the  Y-12 National Security Complex in Oak Ridge, Tenn., on Friday, Aug. 17, 2012. The plant recently resumed operations put on hold after three anti-war protesters, including an 82-year-old nun, cut their way through three fences and spray-painted slogans on the wall of a weapons-grade uranium facility. (AP Photo/Erik Schelzig)

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