This image provided by the U.S. Coast Guard shows fire boat response crews battle the blazing remnants of the off shore oil rig Deepwater Horizon Wednesday April 21, 2010. The Coast Guard by sea and air planned to search overnight for 11 workers missing since a thunderous explosion rocked an oil drilling platform that continued to burn late Wednesday. (AP Photo/US Coast Guard)
December 7, 2010 8:15:12 AM PST
By HARRY R. WEBER, Associated Press
HOUSTON - December 7, 2010 --
A key federal investigative panel is nearing the final stretch in its quest to assign blame for the Gulf of Mexico rig explosion and worst offshore oil spill in U.S. history.