NATIONAL HARBOR, Md. — Air Force Secretary Heather Wilson said her initial $13 billion cost estimate to stand up a Space Force and sustain it for five years is likely to be revised upward as more data is crunched.

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Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...