Amazon has unveiled a bold vision for integrating drones into the skies above our cities, proposing drone superhighways that would crisscross the sky and enable thousands of unmanned vehicles to fly at high speeds under completely automated control.

The proposal, delivered at a key industry conference in Silicon Valley on Tuesday, received a cautious welcome from at least one regulator and is the latest move in a back-and-forth between U.S. government regulators and private companies eager to make money off drones.

“It’s really a call for action,” said Gur Kimchi, co-founder of Amazon Prime Air. “We need to come together as an industry, both public and private, NASA and Amazon, many other companies here.”

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