[cnn-photo-caption image=http://i.cdn.turner.com/cnn/2010/US/07/15/oil.spill.faq/story.jpg caption="The Gulf of Mexico oil disaster began April 20 after the Deepwater Horizon oil rig exploded." width=300 height=169]
Here are answers to some basic questions about the massive oil leak in the Gulf of Mexico.
How did this all start?
The disaster, the worst environmental incident in U.S. history, was triggered April 20, when the oil drilling rig Deepwater Horizon exploded, burned and then sank two days later. Eleven workers were killed.
"There is no doubt at all here that what has happened is the blowout prevention mechanism at the bottom of the well ... is defective," Interior Secretary Ken Salazar said May 2 on CNN's "State of the Union."
Why is it taking so long to shut off the flow of oil? What methods have been tried to stop the oil flow at its source?
Filed under: Gulf Oil Spill
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