Unmanned Spacecraft Scientific or Sinister?

It's not a bird, it's not a plane, but it is a short, fat spacecraft that has no pilot! An unmanned X-37B Orbital Test Vehicle spacecraft that looks like a squat space shuttle landed at Vandenberg Air Force Base in the wee hours of the morning after spending seven months in space, according to the LA Times.

The Vandenberg Air Force Base says the pilotless space craft conducted "experiments" and "completed all the on-orbit objectives" while up in space on its maiden voyage, but the LA Times points out there has been speculation that the curious-looking craft might be used for military purposes instead.

The front-running guess of more sinister uses for this X-37B craft? An orbital bomber that can attack from space.

Air Force officials are planning another launch this Spring when the possibly crafty craft will take flight aboard an Atlas V booster.