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ASSOCIATED PRESS FILE - This file photo taken Tuesday Feb. 21, 2012 shows clothing lying in heaps at the site of a neighborhood destroyed by the 2011 earthquake and tsunami, in Rikuzentakata, Japan. Scientists believe ocean waves carried away 3-4 million tons of the 20 million tons of debris created by tsunamis that slammed into Japan after a magnitude-9.0 earthquake nearly a year ago. One-to-two million tons of it _ lumber and other construction material, fishing boats and other fragments of coastal towns _ are still in the water and are being carried across the Pacific by ocean currents. One to five percent of that may reach coastlines in Hawaii, Alaska, Oregon and Washington states. (AP Photo/David Guttenfelder, File)
CRAIG T. KOJIMA Jan Hafner, left, scientific computer programmer, and Nikolai Maximenko, senior researcher from the University of Hawaii International Pacific Research Center, shared their findings Tuesday of tsunami debris generated by the 2011 Japanese earthquake. Above, clothing lay in heaps Feb. 21 at the site of a neighborhood destroyed by the 2011 disasters, in Rikuzentakata, Japan.