USAF MH-139 Grey Wolf conducts first operational Minuteman III ICBM convoy security mission
Two Boeing MH-139A Grey Wolf helicopters of the 40th Helicopter Squadron conducted their first operational convoy escort for Minuteman III ICBM sites at Malmstrom AFB, Montana on Jan. 8, beginning the type’s entry into nuclear security duties and a milestone in USAF ICBM modernization.