▁ 2 0 1 5 . ▁The ▁Cong r essional ▁Bud get ▁Office ▁has ▁estimated ▁a ▁cost ▁of ▁$ 3 5 5 ▁billion ▁to ▁upgrade ▁the ▁tri ad ▁of ▁the ▁U . S . ▁nuclear ▁weapons ▁systems ▁including ▁IC B M s , ▁sub mar ines ▁and ▁bom bers . ▁ ▁The ▁base ▁is ▁recorded ▁on ▁the ▁list ▁of ▁Super fund ▁sites ▁in ▁Wy oming ▁because ▁of ▁cont amin ated ▁land ▁on ▁the ▁site . ▁ ▁Pre vious ▁names ▁▁ ▁Est ab lished ▁as ▁Fort ▁Francis ▁E . ▁Warren , ▁ 1 ▁January ▁ 1 9 3 0 ▁( Un ited ▁States ▁Army ) ▁ ▁C ame ▁under ▁USA AF ▁control , ▁ 3 1 ▁May ▁ 1 9 4 7 ▁ ▁Francis ▁E . ▁Warren ▁Air ▁Force ▁Base , ▁ 7 ▁October ▁ 1 9 4 9 – present ▁ ▁Major ▁commands ▁to ▁which ▁assigned ▁▁ ▁Air ▁Training ▁Command , ▁ 3 1 ▁May ▁ 1 9 4 7 ▁ ▁Str ateg ic ▁Air ▁Command , ▁ 1 ▁February ▁ 1 9 5 8 ▁ ▁Air ▁Com bat ▁Command , ▁ 1 ▁June ▁ 1 9 9 2 ▁ ▁Air ▁Force ▁Space ▁Command , ▁ 1 ▁July ▁ 1 9 9 3 ▁ ▁Air ▁Force ▁Global ▁St rike ▁Command , ▁ 7 ▁August ▁ 2 0 0 9 ▁– ▁present ▁ ▁Base ▁operating ▁units ▁▁▁ 4 6 3 d ▁AF ▁Base ▁Unit , ▁ 1 ▁June ▁ 1 9 4 7 ▁▁ 3 4 5 0 th ▁Air ▁Base ▁G p ,