Enlarge / Air Force Secretary Heather Wilson shows a model of the X-37B during a Tuesday hearing of the Senate Armed Services Committee. (credit: US Armed Service Committee) The US Air Force has two X-37B space planes, and since 2010 each of them have flown two missions into outer space. Those flights have ranged in…

via SpaceX will launch the Air Force’s secretive space plane on its next flight — Ars Technica

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