The Air Force wants you to know about its secret robotic spacecraft, the X-37B

As for what it does? That's still unspecified. X-37B Orbital Test Vehicle The X-37B is just 29 feet, 3 inches long, with a wingspan an inch shy of 15 feet. DoD photo courtesy of United Launch Alliance The Air Force has a secret space robot called the X-37B. We know this because the Air Force is…