Why didn't the US Minerals Management Service require that Big Oil install secondary blowout preventers on oil rigs, as other countries have? Congress is investigating this and other issues.
The oil spill in the Gulf of Mexico has tripled in size in 24 hours. Company officials remain confident that they can contain it before it hits land, but environmentalists are increasingly doubtful.
The Deepwater Horizon oil rig explosion comes three weeks after the Obama administration proposed opening up parts of the Gulf for deepwater exploration. Two Democratic senators are raising broader safety concerns.