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Now Playing: 4-16-13 Marketplace Tech: Can You Really Hack a Plane Cockpit?

A researcher used an smart phone app to hack the cockpit of a virtual airplane. The setting was a computer security conference in Amsterdam. The FAA and several makers of cockpit equipment say that feat would be much harder, if not impossible, in a real aircraft. We asked regular contributer Chester Wisnewski at computer security firm Sophos if he gives this much credence. He doesn't -- but he does think the story could make flying safer.