This June 7, 2012 photo proivded by the Oregon Department of Parks and Recreation shows an unidentified person sterilizing the side of a dock float torn loose from a Japanese fishing port by the 2011 tsunami that washed up on Agate Beach near Newport, Ore. Scientists say they don't now yet how much the tons of tsunami debris may add to the invasive species problem on the West Coast. (AP Photo/Oregon Department of Parks and Recreation)
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