A joint assessment by the Air Force and Navy found pursuing full commonality for the future Ground-Based Strategic Deterrent and the Submarine-Launched Ballistic Missile is "not feasible or practical," the Pentagon told lawmakers in a report delivered last month. In analyzing potential overlap between the full systems, subsystems and components, the services determined that using the Navy's Trident II life-extension program, which redesigns and replaces missile electronics and handles additional procurement and testing, to replace the Minuteman III intercontinental ballistic...