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Amazon Developing Drone Delivery Service (VIDEO)

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The drones — "still years away," according to Bezos — will be able to transport items weighing up to five pounds, which he said comprise 86 percent of Amazon's deliveries. 

Bezos said the drones will be "autonomous," meaning they won't be operated by humans.

"You give them instructions of which GPS coordinates to go to and they take off and they fly to those GPS coordinates," he said.

Bezos purchased The Washington Post in August and laid out his vision for the newspaper in an interview in September.