See, we really are dangerous. Lol. Seriously, this is an old mystery that may finally have been solved.
'They assumed witnesses had gotten at least one detail correct—that the hijacker was a man. But in a small airplane hanger in Puyallup, Washington, two aviation enthusiasts had their doubts. They had struck up a friendship with a fellow pilot named Barbara Dayton. The more Dayton talked, the more her friends suspected the investigation had a fatal misconception. D.B. Cooper was not a man at all, but a woman who disguised herself as one in order to pull off the most audacious air heist in history'.