the drone is set to return to the airfield it launched from.
iran overrode the GPS signal getting the the drone (ground based systems blasting GPS at the drone), and the drone thought it was landing at the afghan airfield. the iranian airfield was a bit higher in elevation, which hurt some parts of the landing gear, hence the black skirt.
if you dont think the gps can be overridden, read this: http://securitywatch.pcmag.com/none/...-1-000-spoofer
recently iran has claimed to have another US drone (navy ScanEagle drone)
http://news.kuwaittimes.net/2012/12/...rone-captured/



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