guidance system development program. Secretary McNamara's recommendation was not acted upon, and the Hound Dog remained in service. After thirteen years of service with the Air Force, the last Hound Dog missile was removed from alert deployment on June 30, 1975. The Hound Dog missiles were kept in dead storage for a number of years. The last Hound Dog was retired for scrapping on June 15, 1978, from the 42nd Bomb Wing at Loring Air Force Base, Maine. No Hound Dog missile was ever used in combat, since it was strictly a weapon for nuclear warfare. Numbers in service The number of Hound Dog missiles in service, by year: Variants XGAM-77 — 25 prototype missiles produced GAM-77 — 697 missiles produced. GAM-77A — 452 missiles upgraded from GAM-77 to GAM-77A configuration. AGM-28A — The GAM-77 was redesignated the AGM-28A in June 1963 AGM-28B — The GAM-77A was redesignated the AGM-28B in June 1963 AGM-28C — Proposed Hound Dog that would have been equipped with a TERCOM guidance system. Operator United States Air Force Units using the Hound Dog 2d Bombardment Wing – Barksdale AFB, Louisiana 20th Bombardment Squadron 62d Bombardment Squadron 596th Bombardment Squadron 5th Bombardment Wing, Heavy – Travis AFB, California / Minot AFB, North Dakota 23d Bombardment Squadron 6th Bombardment Wing, Heavy – Walker AFB, New Mexico 24th Bombardment Squadron 40th Bombardment Squadron 11th Bombardment Wing, Heavy – Altus AFB, Oklahoma 26th Bombardment Squadron 17th Bombardment Wing, Heavy – Wright-Patterson AFB, Ohio 34th Bombardment Squadron 19th Bombardment Wing, Heavy – Homestead AFB, Florida / Robins AFB Georgia 28th Bombardment Squadron 28th Bombardment Wing, Heavy – Ellsworth AFB, South Dakota 77th Bombardment Squadron 39th Bombardment Wing – Eglin AFB, Florida 62d Bombardment Squadron 42d Bombardment Wing, Heavy – Loring AFB, Maine 69th Bombardment Squadron 70th Bombardment Squadron 68th Bombardment Wing – Seymour Johnson AFB, North Carolina 51st Bombardment Squadron 70th Bombardment Wing – Clinton-Sherman AFB, Oklahoma 6th Bombardment Squadron 72d Bombardment Wing, Heavy – Ramey AFB, Puerto Rico 60th Bombardment Squadron 92d Bombardment Wing, Heavy – Fairchild AFB, Washington 325th Bombardment Squadron 97th Bombardment Wing, Heavy – Blytheville AFB, Arkansas 340th Bombardment Squadron 306th Bombardment Wing – McCoy AFB, Florida 367th Bombardment Squadron 319th Bombardment Wing, Heavy – Grand Forks AFB, North Dakota 46th Bombardment Squadron 320th Bombardment Wing – Mather AFB, California 441st Bombardment Squadron 340th Bombardment Wing – Bergstrom AFB, Texas 486th Bombardment Squadron 379th Bombardment Wing,