How Underwater Drones Are Searching For the Lost Pilots of WWII

Deep below the Pacific Ocean, dozens of WWII pilots are lying in watery graves, still inside the aircraft took them across the sky decades ago. It's far too late for a rescue, but as Popular Science explains, the people behind the BentProp Project—and their undersea drones—are surfacing these soldiers' incredible… » 8/18/13 4:25pm 8/18/13 4:25pm