The Air Force's Mysterious Space Plane Has Been in Orbit For a Whole Year

The Air Force's secretive X-37B space plane gets more mysterious by the day. Designed to spend up to nine months on unspecified errands in Earth's orbit, the second copy of the Boeing-made craft, known as Orbital Test Vehicle 2, has now been in space for a year and two days - and is still going strong. The endurance… »3/07/12 7:43am3/07/12 7:43am