The drones watching over Afghanistan and Pakistan overwhelm human analysts with terabytes of video, radar, infrared and hyperspectral data. Ideally, aircraft gathering raw information over the battlefield would filter, tag, organize, and route. that data for quick, efficient analysis on the ground. That’s what Blue Devil Block II is designed to do. The 370-foot airship, which can hover at 20,000 feet for five days, functions as a network hub for drones and ground sensors and as a surveillance craft in its own right. Built for the Air Force by the defense start-up Mav6, the blimp carries a 2,000-core supercomputer. It is scheduled to fly in Afghanistan next year.