It takes more than whimsy for a giant airline to ground a multimillion-dollar jumbo jet. What the renowned investigative writer John Fuller stumbled upon was a jet-age ghost story - crews wouldn't fly the plane because of the reappearing apparitions of a dead pilot and flight engineer from a crashed sister ship. It was the famed Lockheed Tristar; the first jumbo jet ever to crash, in the Florida Everglades, with the loss of 101 persons. In his investigation into this amazing story, John G. Fulle