Ready for its closeup: The first demilitarized Global Hawk debuts in 2009 at NASA’s Dryden center in California, where scientists will use it to study hurricanes, pollution, and other ...

NASA/Goddard Space Flight Center Caption NASA's Global Hawk No. 872 departed from a runway surrounded by a sea of green grass at NASA's Wallops Flight Facility on Sunday, Sept. 28.

The RQ-4 Global Hawk is a high-altitude, long-endurance unmanned aircraft system with an integrated sensor suite that provides intelligence, surveillance and reconnaissance, or ISR, capability ...

The Global Hawk UAV flies over Hurricane Karl to reveal a hot tower. Red shows reflectivity that is 12 km from the surface, orange is 10 km, yellow is 7.5 km, green is 6 km, and blue is under 6 km ...

Drone’s-eye view: From 60,000 feet, a NASA Global Hawk observed Tropical Storm Frank swirling over the Pacific in August 2010. John Farrar, a Harvard scientist who in 1815 witnessed one of the ...