U.S. Chemical Safety Board

The Associated Press

A federal investigative board concludes that 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.

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. And that, they said, led to the dumping of 172 million gallons of oil into the Gulf of Mexico.