 Simulated Electronic Launch Peacekeeper

The Simulated Electronic Launch Peacekeeper (SELP) is a system used by the United States to simulate and test the launch procedures and operational readiness of the LGM-118A Peacekeeper missile system. The Peacekeeper missile, also known as the MX missile, was an intercontinental ballistic missile (ICBM) designed to enhance the U.S. strategic nuclear deterrent during the Cold War.