What the 29-foot-long craft did during all those months in orbit is still a matter of intense speculation. Conspiratorially minded types conjectured that it might be a prototype for an orbiting bomber. Others warned of "a johnny-on-the-spot weapons platform to take out the satellite assets of an enemy."

Prominent members of the Russian military establishment screamed that Moscow needed to build up its own space arsenal, ASAP. The British press, meanwhile, made dark insinuations about "the testing of new laser weapon systems" in space.

Better-informed observers believe the X-37B could be used by the Pentagon as a cheap replacement for the all-but-defunct Space Shuttle — a way to get spy sensors into orbit in a hurry.

And the U.S. military's use of space planes is only getting started. As David Axe noted last week, the Air Force has commissioned a second X-37, to enter service next spring. The first X-37 could find itself back in orbit in short order, as well. Which means we could see more dudes in crazy-looking suits meeting up with robotic spacecraft soon.

Authors: Noah Shachtman

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