REMOVES DATE OF PHOTO AND REFERENCE TO THE TIMING OF DAN COOPER'S DISAPPEARANCE IN THE FIRST SENTENCE. AT THIS TIME THE DATE OF THE PHOTO CANNOT BE CONFIRMED - FILE -- In this undated file photo, a helicopter takes off from search headquarters to scour the area where hijacker Dan Cooper might have parachuted into in Woodland, Wash. The past has been a rich year for students of D.B. Cooper, the mysterious skyjacker who vanished out the back of a Boeing 727 wearing a business suit, a parachute and a pack with $200,000 in ransom money 40 years ago, Thursday, Nov. 24, 2011. (AP Photo, File)