Fifty-one minutes before the explosion and fire aboard Deepwater Horizon, workers on the rig sensed something was wrong. Within an hour, oil was gushing from the mangled wellhead. Here’s what we know so far.
BP will attempt a 'top kill' in which heavy mud and cement would be shot into the well to plug it up.
BP has not met the EPA's mandate that it switch to a new dispersant, saying there aren't any other viable options for the Gulf oil spill. But the EPA says it's 'not satisfied,' and the manufacturer of a different dispersant insists it can meet BP's needs.
Government and BP estimates of the amount of oil spewing into the Gulf of Mexico are too low, say scientists. Some equate the flow to one Exxon Valdez spill every five days.
BP is using underwater robots to place a small tube inside the broken undersea pipe to siphon the Gulf oil spill.
Senators grilling executives from the companies at the center of the Gulf oil spill tried to discern why fail-safe systems failed and why the spill has gotten out of hand. They got few answers.
Blowout preventer. Cementing operations. Design flaws. Top executives from BP America, Halliburton, and Transocean testified Tuesday about possible causes of the BP oil spill.
As oil continues to spew into the Gulf of Mexico, the Obama administration moves to break up the agency tasked with both collecting royalties and policing Big Oil.
A BP shareholder from the United States is suing company executives over ignoring safety issues prior to the explosion on the Deepwater Horizon and subsequent Gulf oil spill.
State attorneys general, commercial fishing organizations, and environmental groups are pressing BP to provide more information on the cause of the massive Gulf oil spill.