In Search of DB COOPERAP Photo/Reid BlackburnFBI agents scour the sand of a beach on the Columbia River in February 1980, searching for additional money or clues in the D.B. Cooper skyjacking case, in Vancouver, Wash. Several thousand dollars of the hijacking money was found in the area days earlier. AP Photo/Eric RisbergPart of the money that was paid to legendary hijacker D.B. Cooper in 1971 is shown during an F.B.I....