The Army is delaying plans to begin full-rate production of the Joint Light Tactical Vehicle, originally slated for December 2018, until as late as early summer to assess options for vehicle-design changes suggested by soldiers and Marines during testing and evaluation in a move that could push the $28 billion program toward a schedule breach. Michael Clow, a spokesman for the program executive office of combat support and combat services support, said the government -- which has expended more than...