MOJAVE, CA - APRIL 3: Doug Shane, Scaled Composites' business development vice president, uses a computer to remotely pilot a Proteus aircraft during flight demonstrations of collision avoidance systems April 3, 2003 in Mojave, California. The National Aeronautics and Space Administration (NASA), in cooperation with Scaled Composites, is testing a system that can identify aircraft operating without transponders. Approximately twenty-two aircraft collision scenarios are currently being tested, using an unmanned aircraft and a variety of target aircraft ranging from a hot air balloon to a high-speed NASA F/A-18 jet. (Photo by David McNew/Getty Images)
