Your knack for jigsaw puzzles could revolutionize national defense.

Darpa, the blue-sky agency whose most successful pipe-dreams have turned into the Internet and GPS navigation, among others, has in recent years turned to civilians for help in catalyzing new innovations. First was the Grand Challenge for driverless car design. Then came the Network Challenge that sent the socially networked searching for red weather balloons. Calls to crowdsource spy drones and combat vehicles quickly followed.  Today, Darpa announced their latest mission for the mob.

And what could be sexier or more...