DefenceTalkThe US Air Force is preparing to launch its super-secretive space drone into orbit again, and this time NASA will use the flight to see how 100 or so “materials of interest” hold up in space’s harsh zero-gravity environment. No details were released about the nature of the X-37B Orbital Test Vehicle’s three previous orbital […]https://www.defencetalk.com/pentagons-mysterious-x-37b-space-drone-heads-back-into-orbit-64264/