FILE - In this March 6, 2013 file photo, a warning sign is shown attached to a fence at the 'C' Tank Farm at the Hanford Nuclear Reservation, near Richland, Wash. Documents obtained by the Associated ... more 
FILE - In this March 6, 2013 file photo, a warning sign is shown attached to a fence at the 'C' Tank Farm at the Hanford Nuclear Reservation, near Richland, Wash. Documents obtained by the Associated Press show that there are “significant construction flaws” in some newer, double-walled storage tanks at the nuclear waste complex. (AP Photo/Ted S. Warren, File) less 
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Associated Press | Photo By Ted S. Warren, File
Fri, Feb 28, 2014 7:42 PM EST