Defective BP Blow Out Preventer Sent Upriver By Michael McIntee | September 11, 2010 LikeTweet EmailPrint More More on Environment Subscribe to Environment Follow this author Coast Guard, New Orleans Port Authority and Homeland Security units provide an escort as the blowout preventer of the Deepwater Horizon is transported on the Mississippi River into New Orleans, Sept. 11, 2010. The blowout preventer will be used to help the joint Bureau of Ocean Energy Management/US Coast Guard investigation determine the circumstances surrounding the explosion, fire, pollution, and sinking of the Mobile Offshore Drilling Unit Deepwater Horizon. U.S. Coast Guard photo by Petty Officer 3rd Class Stephen Lehmann. Support this story and all the stories from The Uptake. Donate.