`` If you walk up and down this beach , you 'll see big chunks , '' Alaska man says . estimated at 1.5 million tons -- believed to be headed toward North American shores . Comment: Tsunami debris could be washing ashore for a year , NOAA says .
`` If you walk up and down this beach , you 'll see big chunks , '' Alaska man says . Comment: Tsunami debris could be washing ashore for a year , NOAA says .