The Los Angeles Times reports federal investigators are looking at Halliburton’s role in the disaster. Halliburton was responsible for cementing the deepwater drill hole — a key procedure to prevent oil well blowouts. It had completed the final cementing of the well and pipe twenty hours before the blowout on April 20. Halliburton had four employees stationed on the rig at the time of the Gulf accident, all of whom were rescued by the Coast Guard. Meanwhile, the Wall Street Journal has revealed federal regulators learned in 2004 that a vital piece of oil drilling safety equipment may not function in deepwater seas, but regulators did nothing to bolster industry requirements.