The War is Boring blog provides an interesting post about how the military is attempting to capitalize on work that Scaled Composites and Virgin Galactic are doing in space tourism:
SUSTAIN would be two vehicles. The jet-powered mother-ship, based in the U.S. or at a secure, overseas facility, would loft a smaller, rocket-powered â€œlanderâ€ to high altitude â€” say, 50,000 feet â€” before launching it. The rocket would quickly boost the lander to an altitude of around 400,000 feet, just shy of the orbital threshold. On completing its mission, the lander would deploy air brakes and spiral down to a landing.