LGM-118A Peacekeeper (MX) ICBM

The LGM-118A Peacekeeper, initially known as the "MX missile" (for Missile-eXperimental), was a land-based ICBM deployed by the United States starting in 1986. A total of 50 missiles were deployed. Under the START II treaty, which never entered into force, the missiles were to be removed from the U.S. nuclear arsenal in 2005, leaving the LGM-30 Minuteman as the only type of land-based ICBM in the U.S. arsenal. In spite of the demise of START II, the last of the LGM-118A "Peacekeeper" ICBMs were decommissioned on September 19, 2005.

The Peacekeeper was a MIRVed missile; each rocket could carry up to 10 re-entry vehicles, each armed with a 300-kiloton W87 warhead/MK-21 RVs (twenty times the power of the bomb dropped on Hiroshima during World War II).