Exoatmospheric Kill Vehicle

The Exoatmospheric Kill Vehicle (EKV) is the Raytheon-manufactured interceptor component with subcontractor Aerojet of the U.S. Ground-Based Midcourse Defense (GMD), part of the larger National Missile Defense system. == Interceptor == The EKV is boosted to an intercept trajectory by a boost vehicle (missile), where it separates from the boost vehicle and autonomously collides with an incoming warhead.

Source: Wikipedia — Exoatmospheric Kill Vehicle (CC BY-SA 4.0)