After 244 days in space since its launch April 22 from Cape Canaveral, Fla., the X-37B orbital test vehicle landing marks the Air Force's latest step in experimental test missions to improve the service's space capabilities, officials said here Dec. 6. The 11,000-pound OTV made an autonomous landing at Vandenberg Air Force Base, Calif., Dec. 3 at 1:16 a.m., allowing the Air Force to begin evaluation of its functions as a satellite communications, weather and material technology asset, said Deputy Under Secretary of the Air Force for Space Programs Richard McKinney. "We're in a very serious and important business of...