SAN ANTONIO — Mystery shrouds the rogue flight of an Army unmanned surveillance aircraft that was launched from southern Arizona on Jan. 31, flew hundreds of miles independent from human control and was found Feb. 9, broken apart in a tree outside Denver.

http://www.stripes.com/news/questions-hover-over-army-drone-s-630-mile-odyssey-across-western-us-1.456505#.WLn2TPnyuM_