Un fotogramma del video poco prima dell'esplosione

This April 22, 2010 photo provided Sunday, April 25 by the US Coast Guard shows the arm of a robot submarine attempting to activate a shutoff device known as a blowout preventer (BOP) to close off the flow of oil at the Deepwater Horizon well head. Oil leaking from a sunken drilling rig in the Gulf of Mexico oozed slowly toward the coast Monday, endangering hundreds of miles of marshes, barrier islands and white sand beaches in four states from Louisiana to Florida.
(AP Photo/US Coast Guard)