वायु सेना X-37B स्पेसप्लेन सफलतापूर्वक 780-दिवसीय मिशन के बाद पृथ्वी पर लौटता है

Air Force X-37B spaceplane successfully returned to earth Saturday after a 780-day mission, a record flight for a top secret U.S. military plane with no pilot. The solar-powered plane is believed to be a flying lab for testing advanced technology.