Birds fly over containment booms placed to try to stop oil from reaching the shoreline along the South Pass, south of Venice, La. Oil from a massive rig explosion threatens the region's wildlife. Eric Gay/AP hide caption

itoggle caption Eric Gay/AP

Containment booms designed to be a protective barrier circle Dauphin Island at the mouth of Mobile Bay in Alabama. Debbie Elliott/NPR hide caption

itoggle caption Debbie Elliott/NPR