Crews build a sand berm to protect the island from the potential of oil washing onshore, on Dauphin Island, Alabama May 10, 2010. Oil workers, volunteers and the military have been battling to shut off a gushing oil leak in the Gulf of Mexico and stop the huge spreading slick from reaching major ports, tourist beaches, wildlife refuges and fishing grounds. REUTERS/Brian Snyder (UNITED STATES - Tags: DISASTER ENERGY ENVIRONMENT)