The 12-minute audio has been pieced together from tapes dating back to the day of the incident itself.
Although several clues have emerged over the decades, the identity of the hijacker continues to remain a mystery.
A new effort is underway to uncover evidence that could help solve the infamous 50-year-old hijacking case.
A hidden code may have finally lifted the lid on the mysterious hijacker known as DB Cooper.
An independent investigation in to the long-running mystery has managed to dig up an important new clue.
Officials have finally admitted defeat after failing to solve the case of a 1971 airline hijacking.
The man who successfully hijacked an airliner in 1971 might have been a missing grocery store manager.