See HEDI Kite.

Next time before you pull things out of your ass, read things carefully.

http://www.designation-systems.net/dusrm/app4/hedi.html

The U.S. Army’s HEDI (High Endoatmospheric Defense Interceptor) was an SDI (Strategic Defense Initiative) program for a lower-tier ballistic missile defense. As such it was to complement the ERIS (Exoatmospheric Reentry Interceptor Subsystem) upper-tier system.

No true HEDI missiles were built, but technology for an endoatmospheric hit-to-kill missile interceptor was tested by KITE (Kinetic Kill Vehicle Integrated Technology Experiment) test vehicles as part of the HEDI program. KITE was a rail-launched missile based on the older Sprint nuclear-armed ABM (Anti-Ballistic Missile). It was a two-stage solid-fueled rocket, powered by a Hercules X-265 and a Hercules X-271 motor. The KKV (Kinetic Kill Vehicle) was fitted with an infrared seeker, which was protected behind a shroud during the initial high-speed flight through the lower atmosphere. The KITE achieved an acceleration of over 200 G immediately after launch.

That’s not a reentry vehicle [do you want me to spell out the kind of heat produced in reentry], and the seeker has to be protected from heat.