Japanese fishing vessel, "Ryou-Un Maru", shows significant signs of damage after U.S. Coast Guard Cutter Anancapa fired explosive ammunition into it, 180 miles (about 290 km) west of the Southeast Alaskan coast April 5, 2012. The U.S. Coast Guard opened fire on Thursday on a derelict Japanese fishing vessel washed out to sea by last year's devastating tsunami in a bid to sink it and eliminate a threat to navigation, a spokesman for the agency said. REUTERS/U.S. Coast Guard/Handout (UNITED STATES - Tags: DISASTER ENVIRONMENT MARITIME TPX IMAGES OF THE DAY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS