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Pentagon announced intentions to launch fleet of airships which will act as a massive airborne radar system providing perpetual surveillance of vehicles, planes and people on the ground.
...will operate on hydrogen fuel cells and solar panels, floating 65,000 feet above the Earth for 10 years.
The airship, named ISIS (Integrated Sensor Is the Structure), no doubt after the Ancient Egyptian goddess, is being developed under an agreement between the Air Force and DARPA.