 In 1977, the 379th exchanged their B-52Hs for the conventional bomb capable B-52G.In 1989, the Air Force selected Wurtsmith as one of seven bases that would house LGM-118A Peacekeeper ICBM Peacekeeper Rail Garrison.A Rail Garrison would address the survivability problem by which 25 trains, each with two missiles, would use the national railroad system to conceal themselves.