DARPA is about to start a program to develop a reusable first stage that could be used to launch medium-sized satellites for as little as $5 million each.

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Brian Berger is editor in chief of SpaceNews.com and the SpaceNews magazine. He joined SpaceNews.com in 1998, spending his first decade with the publication covering NASA. He was named senior staff writer in 2004, a position he held until being named...