A protective boom is seen as oil from the Deepwater Horizon spill recedes back into the Gulf of Mexico...
A protective boom is seen as oil from the Deepwater Horizon spill recedes back into the Gulf of Mexico after washing into a drainage canal in Waveland, Mississippi July 7, 2010. REUTERS/Lee Celano (UNITED STATES - Tags: DISASTER ENVIRONMENT ENERGY BUSINESS IMAGES OF THE DAY)