Workers at the Hanford Nuclear Reservation near Richland, Wash., are on duty at an underground tank farm where highly radioactive waste is stored on July 14, 2010. (AP Photo/Shannon Dininny)
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Workers at the Hanford Nuclear Reservation near Richland, Wash., are on duty at an underground tank farm where highly radioactive waste is stored on July 14, 2010. (AP Photo/Shannon Dininny)
