Shown here is the nosecone ejection rocket motor for the Peacekeeper intercontinental ballistic missile (ICBM).
One of the major weapon systems introduced during the Reagan-era strategic missile build-up, the Peacekeeper (also designated MX for "Missile Experimental") was intended to replace the Minuteman IIII ICBM, which had been in service since 1970. Controversial because of its greater destructive power and origins as a mobile rather than silo-launched missile, the Peacekeeper never became the mainstay of the U.S. land-based strategic deterrent. The Air Force put only about 50 Peacekeepers into the active inventory in 1989. They were retired and removed from service in 2005.
Donated by Atlantic Research Corporation.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.