Oil washes up on Pensacola Beach, Florida, staining its famous white sands June 23, 2010. Florida saw its worst effect yet from the BP Plc oil spill as thick oily sludge washed ashore on Pensacola Beach. Emergency workers said the pudding-like mixture covered three miles (5 km) of the barrier island that is part of the Gulf Islands National Seashore. REUTERS/Ben Gruber (UNITED STATES - Tags: ENVIRONMENT ENERGY DISASTER POLITICS BUSINESS)