(FILES): This March 21, 2011 file photo shows an aerial view of the Columbia Generating Station, a nuclear power plant inside the Hanford nuclear site beside the Columbia River in Hanford, Washington state. At least six underground tanks containing nuclear waste in the northwestern US state of Washington are leaking, but there is no imminent threat to public health, a spokeswoman said February 22, 2013. The US Energy Department told the state last week that one tank was leaking at the Hanford nuclear site, but Energy Secretary Steven Chu informed its governor Jay Inslee on February 22 that more leaks had been discovered.
AFP PHOTO / Files / Mark RALSTON