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"Amazon badly wants to deliver packages of DVDs and Cheez-Its to your doorstep in a matter of minutes—and it wants to use drones to do so. At a NASA convention in July, Amazon Prime Air’s vice president proposed the company’s vision for how unmanned aircraft could one day safely navigate our skies. And NASA recently began testing its first version of an air traffic management system for drones—the agency is partnering with companies including Amazon and Verizon to develop the system."

"For now, regulations and technical issues make widespread drone deliveries impossible, which means an army of flying machines probably will not fetch your holiday gifts this year or even the next. Here’s what experts note as the major challenges to resolve before delivery by drone becomes a reality."

Continue reading the article at Scientific American, which features comments by Dr. Humphreys.