RICHLAND, WA - JUNE 30: A sign is seen as you enter the world's largest environmental cleanup project at the Hanford Nuclear Reservation June 30, 2005 near Richland, Washington. (Credit: Photo by Jeff T. Green/Getty Images)RICHLAND, WA - JUNE 30: One of the double-shell tank farms containing six underground tanks is seen on the Hanford Nuclear Reservation June 30, 2005 near Richland, Washington. (Credit: Photo by Jeff T. Green/Getty Images)
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