Near the end of 1971, D.B. Cooper—probably not his real name—disappeared after hijacking a plane, extorting $200,000 in ransom cash and parachuting to freedom… or death. Four decades later, the FBI has yet to solve the case, and a fanciful new comic book series, The Secret History of D.B. Cooper, hits shelves in March. But this mystery man is hardly the only notable fellow to vanish with nary a trace. Witness this gaggle of gone guys, who just might be playing a funny on all of us.