The Army has awarded prototype contracts totaling more than $24 million to four bidders for the multibillion-dollar Common Tactical Truck program, the service announced Friday. The contracts, which are other transaction authority agreements, were awarded to Mack Defense, Navistar Defense, Oshkosh Defense and a joint bid from American Rheinmetall Vehicles and GM Defense, according to a press release. Each contractor will produce three prototypes for the CTT Family of Vehicles, which include the M915 Line Haul Tractor, M1088 Medium Tractor,...