Pools of crude oil float on the surface of the Gulf of Mexico at the site of the sunken BP/Transocean oil drill the Deepwater Horizon,as seen from the deck of an emergency oil-skimming response vessel on April 27, 2010. BP, based in London, reached the $7.8 billion settlement in March to resolve most private plaintiffs’ claims for economic loss. Photographer: Benjamin Lowy/Getty Images