Two armed cocaine smugglers prepared "for everything except a snowstorm" were killed Friday in the crash of their drug-laden Aero Commander plane while trying to land at Knoxville's airport, the FBI said.

With its pilot reporting engine trouble as he flew through a surprise snowstorm, the plane plunged into a farm field at 6 a.m. EST 2 miles south of the runway at McGhee-Tyson Airport on a flight from Fort Lauderdale, Fla., to Dayton, Ohio, authorities said.It took rescue teams 90 minutes to find the wreckage in the storm that blanketed Tennessee with up to 3 inches of snow. They discovered the pilot and passenger dead on the ground outside the wreckage and nearly 40 pounds of cocaine worth $450,000 and $10,000 in cash inside, FBI spokesman Wayne Baker said.