[link|http://www.nationalreview.com/comment/comment-levy101201.shtml|Robert Levy says airplane passengers should carry guns].
When Archie Bunker proposed this back in the early 1970's, it was a laugh line. Maybe he was just ahead of his time.
Of course this version of a bit more fleshed out. Excerpt:
Risks can be mitigated. First, insist that the passenger have a concealed-gun permit and pass a background check. Second, require that he be specifically trained in the use of firearms on an airplane. And third, limit the passenger to a gun and ammunition supplied by the airline. Special bullets are available that are destructive to human tissue but come apart at first impact. That would eliminate, or at least minimize, the likelihood that a bullet could penetrate the fuselage.