Workers aboard the Deepwater Horizon were pushing to complete the well at the heart of the Gulf of Mexico oil spill before the disaster, but no "conscious decision" to cut corners on safety has been discovered, a presidential commission reported Monday."There seemed to be a compulsion to get this rig completed in that April 19th-April 20th time period," said Bob Graham, the commission's co-chairman. "And as a result of that, a number of things which might have made the outcome of this plight different were deferred or abandoned."The undersea gusher erupted with an April 20 explosion aboard the Deepwater Horizon drill rig, which was completing a well for the oil giant BP at the time of the blast. The rig sank two days later, taking 11 men to a watery grave and unleashing the worst oil spill in U.S. history.