I should edit my previous posts on that subject because it now appears that the oil-drilling platform had a device called a "blowout preventer" that has redundancies built in and supposedly is fail-safe; yet somehow it failed anyway, which supposedly is unprecedented.
However, what I said about the acoustical valve, which would have prevented the accident when and if the blowout preventer failed, was correct. This valve would have cost $500,000; and here (as in other cases now documented by the revelation of BP internal memos), BP opted to cut costs or save money. See the following article, which also suggests that BP could be using supertankers to help contain the oil spill and again, for cost reasons, is not doing so:
http://www.thedailybeast.com/blogs-and-stories/2010-05-25/shocking-bp-memo-and-the-oil-spill-in-the-gulf/full/
It's coming to light that there is lots of blame to go around. Supposedly some of the crew on the rig saw warning signs of impending problems, and the warnings were ignored. I don't have details on that.
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