Delivering another major blow to the Air Force's star-crossed KC-X tanker program, a bipartisan group of seven senators has called for the Pentagon's inspector general to investigate the service's inadvertent release of bid evaluation to rival contractors last year. An IG investigation could delay the selection of a winner in the $35 billion competition, which could come as soon as next month, though many believe March is more realistic. DOD IG investigations froze source-selection activities during the service's now-defunct Combat...