U.S. braces for more tsunami debris, but impact unclear

This May 28, 2012 photo provided by Chris Pallister shows a Japanese float is collected on the shore of Montague Island near Seward, Alaska. More than a year after a tsunami devastated Japan, killing thousands of people and washing millions of tons of debris into the Pacific Ocean, neither the U.S. government nor some West Coast states have a clear plan for how to clean up the rubble that floats to American shores. (AP Photo/Chris Pallister)