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An air-launched rocket built by Richard Branson’s Virgin Orbit reached orbit Sunday for the first time, delivering 10 experimental CubeSats for NASA and positioning the company for the start of commercial operations.

On its second launch attempt after a propulsion problem prevented its light-class air-dropped rocket from reaching space last year, Virgin Orbit will try to deliver 10 experimental CubeSats into orbit as soon as Sunday on a mission booked by NASA five years ago for $4.7 million.