Global Observer makes first hydrogen-powered flight

Marking the beginning of high-altitude, long-endurance flight testing a Edwards Air Force Base, the Global Observer unmanned aircraft system successfully completed its first flight powered by the aircraft's hydrogen-fueled propulsion system. It is envisaged that two Global Observers, each flying for up to a week at a time, could alternate coverage over any area on the earth, providing a seamless, persistent platform for high-value missions.