General Atomics Aeronautical Systems has quietly rolled out its new Avenger unmanned combat aerial vehicle (UCAV) - formerly known as the Predator C - and completed its first three flights on April 4th, 13th and 14th. While company officials are not calling it a stealthy aircraft, they will admit to a reduced radar signature. The 20-hour-endurance UCAV's undeniably low-observable design offers clues...