After hijacking an aeroplane and extorting $200,000 from the FBI, DB Cooper coolly made his escape via parachute. Forty years on, is America’s most elusive fugitive finally in sight? The night before Thanksgiving, 1971, a man calling himself Dan Cooper, wearing a suit and raincoat, walked up to the Northwest Orient desk at Portland airport in the United State’s Pacific Northwest and spent $20 on a one-way ticket to Seattle. On the plane, he donned a pair of dark sunglasses, ordered a whiskey, lit up a cigarette and coolly handed the stewardess a note. In capital letters, it read: I...