The Missile Defense Agency is utilizing a two-track approach to develop and field a layered counter-hypersonic capability -- adapting mature booster and kill-vehicle technology for the first iterations of a glide-phase and terminal defeat system while working on a longer-term solution based on a clean-sheet design of a weapon optimized for ultra-high-speed operations inside the atmosphere. MDA Director Vice Adm. Jon Hill outlined this scheme publicly for the first time during May 13 remarks at an online event hosted by...