NASA to fly unmanned drone for science research

EDWARDS AIR FORCE BASE, Calif. (AP) -- There will be a powerful new scientific eye in the sky come summer. NASA and Northrop Grumman on Thursday unveiled two unmanned drones that will be used for atmospheric research. One of the two Global Hawks, a version of the Air Force's top-of-the-line unmanned spy plane, will be outfitted with science instruments this spring and conduct its first earth science mission in June for NASA....

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