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The mystery of D.B. Cooper

The FBI’s sketches of the hijacker known as D.B. Cooper. In 1971, he hijacked a passenger jet and bailed out over Washinton state with 10,000 $20 bills. Some law enforcement authorities think he didn’t survive the jump, but his body has never been found. (FBI)
FBI Special Agent Robbie Burroughs with a parachute recently discovered partially buried in a family’s field in southwest Washington state. It was located almost exactly at the midpoint of a line drawn between the two spots that authorities think D.B. Cooper could have landed. (Kevin P. Casey / Associated Press)
A serial number and the date Feb. 21, 1946, were stamped on the parachute found in Washington state. The FBI, with the help of parachute experts, determined that the parachute had no connection to the D.B. Cooper case. (Kevin P. Casey / Associated Press)
FBI Agent Larry Carr, with a wanted poster of a bank robbery suspect, is the newest in a line of about a dozen agents assigned to the D.B. Cooper case since 1971. The job of culling leads is Carr’s alone. His full-time responsibility at the bureau is to investigate bank robberies, so he depends on the momentum of public interest in the Cooper case. (Ken Lambert / Seattle Times)
Some of the $20 bills that were given to hijacker D.B. Cooper. The money was found by a boy on the banks of the Columbia River in 1980. It is the sole link to the only unsolved airline hijacking in U.S. history. (Nick Ut / Associated Press)