Ground Control
Sep 17, 2018
2 minutes
BY JULIET GRABLE
IGH IN THE CANOPY OF A 200-foot Douglas fir, a drone hovers and buzzes, a thermal-imaging camera strapped to its landing gear. Far below, Matt Pickett and Jim Rivers study the image it transmits on a tablet. They fixate on a white-hot blob among the magentas and reds. The flare could be sunlight
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