NASA's Global Hawk unmanned aircraft descends for landing at NASA's Wallops Flight Facility in Wallops Island, Va., on Sept. 7, 2012 during NASA's 2012 Hurricane and Severe Storms Sentinel mission. (NASA Wallops) › View Larger Image
NASA’s Global Hawk unmanned aircraft descends for landing at NASA’s Wallops Flight Facility in Wallops Island, Va., on Sept. 7, 2012 during NASA’s 2012 Hurricane and Severe Storms Sentinel mission. (NASA Wallops) › View Larger Image
