The 391st Fighter Squadron (391 FS) is part of the 366th Fighter Wing at Mountain Home Air Force Base, Idaho. It operates F-15E Strike Eagle aircraft conducting close air support missions. 391st FS Performs close air support, interdiction, strategic attack, suppression of enemy air defense, and defensive counterair missions, employing the full array of U.S. Air Force capabilities including precision-guided munitions and inertially-aided munitions.