US sends mystery mini-shuttle back into space
December 12, 2012  01:27
A top-secret mini-space shuttle has blasted off from Cape Canaveral in the US The Air Force launched the unmanned spacecraft today aboard an Atlas V rocket. It's the second flight for this original X-37B spaceplane. It circled the planet for seven months in 2010. 

A second X-37B spacecraft spent more than a year in orbit. These mystery machines are about one-quarter the size of NASA's old space shuttles, and they can land automatically on a runway.
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