The U. S. Air Force is currently test flying its unmanned X-37B reuasble spacecraft. Last year, for example, the X-37B flew a mission of more than 200 days and made a successful landing. The craft is designed to fly itself, land itself, use a minimal crew for control and maintenance, and project a U. S. technological presence anywhere in the world within an hour or less.
The USAF is also considering developing a larger, manned version. The human-rated vehicle would be smaller than the space shuttle, but capable of carrying up to six people. It would be able to fly itself or be flown by an onboard human pilot.
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