Argus One airship, U.S. military drone Drones and satellites dominate the U.S. military's surveillance arsenal, but fleets of unmanned airships could soon join in keeping an eye on battlefields. One robotic airship contender, the modular Argus One, has upcoming flight demonstrations scheduled at a U.S. Department of Energy Nevada Test Site that hosted nuclear bomb tests during the Cold War. The Argus One's design resembles a segmented sky worm made of connecting modules, and has the flexibility to quickly change its flight path as it slinks through the sky. It can also carry 30 pounds of surveillance sensors or...