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

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