SpaceX successfully fired up its returned Falcon 9
 

Elon Musk and the folks at SpaceX aren't only preparing to return another rocket from space back to the Earth this weekend, they're also running tests on the one that already safely came back. Of course, firing up a Falcon 9 that made the trip to spa...

http://www.engadget.com/2016/01/16/s...rned-falcon-9/