A pelican swims in a make-shift pool after being cleaned of oil at the Clean Gulf Associates Mobile Wildlife Rehabilitation Station on Fort Jackson in Plaquemine, Louisiana, in this May 13, 2010 photograph. The station stood up to provide support for animals that may been affected by the oil spill caused by the April 20 explosion on Mobile Offshore Drilling Unit Deepwater Horizon.
REUTERS/Jeffery Tilghman Williams/U.S. Navy photo/Handout (UNITED STATES - Tags: MILITARY DISASTER ENVIRONMENT ANIMALS) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS