U.S. tactical wheeled vehicle manufacturers face a period of uncertainty as Defense Department purchases decline and the potential for foreign sales remains unknown, according to a study released today by the Government Accountability Office. The GAO report, prepared for the congressional defense committees, notes that the U.S. tactical wheeled vehicle (TWV) industrial base includes seven manufacturers that use common suppliers of major subsystems such as engines and armor. Four of these manufacturers rely on DOD business to varying degrees, though...