Washington, Sha'ban 8, 1435, Jun 6, 2014, SPA -- A U.S. investigative board concluded Thursday that the last-ditch safety device that did not stop the 2010 BP oil spill had multiple failures, was not tested properly, and still poses a risk for many rigs drilling today. The report by the U.S. Chemical Safety Board zeroes in on what went wrong with the blowout preventer and blames bad management and operations. That led to the dumping of 172 million gallons of oil into the Gulf of Mexico. --SPA 12:54 LOCAL TIME 09:54 GMT www.spa.gov.sa/w