File photo of fire boat response crews battling the blazing remnants of the off shore oil rig Deepwater Horizon, off Louisiana

 
File photo of fire boat response crews battling the blazing remnants of the off shore oil rig Deepwater Horizon, off Louisiana
Fire boat response crews battle the blazing remnants of the off shore oil rig Deepwater Horizon, off Louisiana, in this file handout photograph taken on April 21, 2010. REUTERS/U.S. Coast Guard/Handout/Files