A dead sea turtle lies on the beach in Pass Christian, Mississippi, U.S., May 2, 2010. President Barack Obama said on May 2 that the United States is dealing with a "massive" and "potentially unprecedented" environmental disaster as a result of the expanding oil spill in the Gulf of Mexico caused by a sunken oil rig. British Petroleum (BP) announced on May 3 that it will pay "all necessary and appropriate clean-up costs" resulting from the blown-out oil well that has caused a massive slick that continues to swell in the Gulf of Mexico. [Fotomore.cn]