Zipline's Blood-Toting Drones Aim for American Skies

When I first visited Zipline, two years ago, the startup was operating out of a pile of shipping containers, in a cow-filled field on the Pacific Coast, in Northern California. Now, when I round the corner on the dirt road leading to the startup's new test range, I'm met by what looks like a prototype lunar base dotted with stretched white tents and hulking containers. Tall metal trusses point into the sky, topped by spiky metal ball-shaped lightning conductors. There is also a row of "Zipline Parking Only" signs, although I haven't seen anything but cows for miles around. This is where Zipline is testing what it calls the fastest commercial delivery drone in the world.