North Korea has significantly advanced its strike capabilities, not only with a greater variety of strategic and tactical missiles but also maneuverable reentry vehicles (MaRV) and likely developments in multiple independently targetable reentry vehicles (MIRV). 

Against this backdrop, regional missile defense systems are increasingly insufficient, and this makes it worth considering boost-phase intercept capabilities that aim to destroy enemy missiles in the early stages of flight, thereby supplementing midcourse and terminal-phase interceptors. 

Missiles during the boost phase are easier to track and intercept compared to the midcourse and terminal phases. Missiles in the initial stage