DARPA pushes limits of unmanned aircraft capability to extremes
March 11, 2008 | Source: Flight International
DARPA is pushing the boundaries of unmanned aviation to extremes, with its Vulture program to demonstrate an unmanned aircraft capable of staying aloft for five years, and its Rapid Eye, a UAV that could be rocket-deployed to anywhere in the world within hours.
NASA concept for on high-altitude unmanned aircraft (NASA)