Simulated Electronic Launch Peacekeeper (SELP) was a method used by the United States Air Force to verify the reliability of the LGM-118A Peacekeeper intercontinental ballistic missile. SELM replaced key components at the Launch Control Center to allow a physical "keyturn" by missile combat crew members. This test allowed end-to-end verification of the ICBM launch process. SELP was phased out with the deactivation of the Peacekeeper ICBM in 2005.