March 28, 2012
Ground-Based Midcourse (GMD) Interceptors and Silos
The GMD’s 30 deployed Ground-Based Interceptors (GBIs) are emplaced in three silo fields at Fort Greely in central Alaska and four silos at Vandenberg Air Force Base in California. There is also at least one silo reserved for testing at Vandenberg. Currently, 26 interceptors are deployed at Fort Greely and 4 at Vandenberg. However, no more than 20 of these are apparently currently considered to be operational.