One year after the ominous explosion on the Deepwater Horizon drilling rig off the Louisiana coast, a look back at key moments in the bid to stop the rampaging Gulf oil spill.
Crews are lowering a steel and concrete containment cap over the underwater source of the BP oil spill in the Gulf of Mexico. It's a tricky maneuver, and there's no guarantee it will work.
Prices jump for oil-containment booms, as communities scramble to protect their coastlines from the approaching slick from the Gulf oil spill. Moreover, booms are effective only in certain conditions, experts say.
BP has failed to manually shut the blowout preventer, and it could take three months to drill a relief well. Before then, BP will try to put a giant hood over the leaking wellhead, or perhaps even install a second preventer. But no short-term options have a proven track record to stop an oil spill.