The squadron flew the B-47 Until 1965, when the medium bomber began to be phased out of SAC's inventory. Ground alert for B-47s was terminated on 11 February 1966. The squadron began to send its Stratojets to the Aerospace Maintenance and Regeneration Center at Davis-Monthan Air Force Base for retirement. It began receiving Boeing B-52G Stratofortresses in June 1966, receiving its aircraft from the inactivating 70th Bombardment Squadron at Loring Air Force Base, Maine. It trained in strategic bombardment missions, and stood ground alert with its Stratofortresses. it also periodically flew "airborne alert indoctrination" missions, but accidents at Palomares in January 1966 and Thule in January 1968 contributed to the end of Operation Chrome Dome, as did rapidly rising costs of the program and the use of strategic bombers for non-nuclear missions, but the primary reason was the availability of a survivable intercontinental ballistic missile force. The squadron continued to fly the B-52 until January 1971.