U.S. Coast GuardYou can't blame illegal drugs for this -- but how about legal drugs? And how about the next time?An eye-opening article in today's San Francisco Examiner recounted the mountains of hard-core prescription narcotics picked up by Cosco Busan pilot John Cota in the months before he directed the ship into the Bay Bridge. The article was culled from a jaw-droppingly thorough National Transportation and Safety Board investigation into the troubled pilot's medical history. You can read t