FILE - This aerial April 21,2010 file photo, taken in the Gulf of Mexico, more than 50 miles southeast of Venice on Louisiana's tip, shows an oil slick is seen as the Deepwater Horizon oil rig burns. The last-ditch safety device that didn’t stop the 2010 BP oil spill had multiple failures, wasn’t tested properly, and still poses a risk for many rigs drilling today, another federal investigation board concludes. The report issued Thursday by the U.S. Chemical Safety Board zeroes in on what went wrong with the blowout preventer and blames bad management and operations. They found two different sets of wrong wiring, a dead battery and a bent pipe in the hulking failsafe device. And that they said led to the dumping of 172 million gallons of oil into the Gulf of Mexico. (AP Photo/Gerald Herbert, File)
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