Amazon CEO Jeff Bezos said in a "60 Minutes" interview Sunday night that the online retail giant is experimenting with a drone-based delivery service called "Prime Air," which would drop packages on a customer's doorstep within 30 minutes.

Without the middle man.

The project, still in a testing phase, could take flight within four or five years, Bezos said.

The announcement came during an in-depth profile of Bezos, after a surprise announcement had been teased earlier in the day.