Millions of tons of debris that washed into the ocean during Japan's catastrophic earthquake and tsunami in March -- everything from furniture to roofs to pieces of cars -- are now moving steadily toward the United States and raising concerns about a potential environmental headache.
Scientists using computer models say the wreckage, which is scattered across hundreds of miles of the Pacific Ocean, is expected to reach Midway and the Northwestern Hawaiian Islands by next spring and beaches in California, Oregon and Washington in 2013 or early 2014.
