Zephyr UAS smashes its own endurance record, may still be up there
NASA Small Business Partnership Prepares Drone for 30-Day Flights | NASA
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After setting ultra-endurance record, Army Zephyr drone keeps flying, whether it wants to or not - Breaking Defense
China's Big New Twin-Jet Long-Endurance Armed Combat Drone Emerges
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UAVOS Expands Family of Medium-Altitude Long-Endurance UAVs | Unmanned Systems Technology