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In this Tuesday, May 21, 2019 photo, Ron Johnson, NASA's project manager for Unmanned Aircraft Systems Traffic Management, points to an image detailing airspace elevations in downtown Reno. Nev., where NASA conducted the first drone tests of their kind in an urban setting. A series of simulations are testing the emerging technology that someday will be used to manage travel of hundreds of thousands of commercial, unmanned aerial vehicles (UAVs) delivering packages. (AP Photo/Scott Sonner)

In this Tuesday, May 21, 2019 photo, Ron Johnson, NASA's project manager for Unmanned Aircraft Systems Traffic Management, points to an image detailing airspace elevations in downtown Reno. Nev., where NASA conducted the first drone tests of their kind in an urban setting. A series of simulations are testing the emerging technology that someday will be used to manage travel of hundreds of thousands of commercial, unmanned aerial vehicles (UAVs) delivering packages. (AP Photo/Scott Sonner)

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