We All Live in a Flying Submarine

For some military operations, you need a submarine. For others, you need a plane. But what if you need both? DARPA has a plan for that - a submarine that flies. Or a plane that submerges, depending on your point of view.Currently, the flying sub only exists as a set of design objectives issued by DARPA (the Defenseā€¦ » 11/24/08 2:20pm 11/24/08 2:20pm