374th Strategic Missile Squadron

The 374th Strategic Missile Squadron (374 SMS) is an inactive United States Air Force unit. It was last assigned to the 308th Strategic Missile Wing, stationed at Little Rock AFB, Arkansas.

The 374 SMS was equipped with the LGM-25C Titan II Intercontinental ballistic missile (ICBM), with a mission of nuclear deterrence. The squadron was inacivated as part of the phaseout of the Titan II ICBM on 15 August 1986.

The squadron was responsible for Launch Complex 374-7, site of the highly publicized explosion of a Titan II ICBM (Intercontinental Ballistic Missile) on 19 September 1980.

World War II
The squadron was activated in early 1942 in Idaho as a long-range B-24 Liberator bombardment squadron as part of the Second Air Force. For three months little training occurred while the unit worked through its growing pains, resolving administrative and personnel acquisition difficulties. Then a totally new problem arose....all but four personnel were transferred to the 330th Bombardment Group. While active on paper, it was not until September that personnel were taken from the 39th Bombardment Group to form a headquarters cadre for the 308th Group, making it a viable unit. On 29 September, the squadron was designated an Operational Training Unit (OTU) with Wendover Field, Utah as its home station. The unit was fully manned by November, after receiving personnel from the 18th Replacement Wing.

During this time of trials and tribulations in forming a recognizable force, the flying echelon had transferred to Davis-Monthan Field, Arizona, on 20 June for incidental training. The flight crews had been chosen and assigned, having completed their respective training schools; i.e., pilot, navigator, bombardier, engineer, radio and gunnery.

Members of the squadron had to complete three phases of training prior to moving overseas and entering combat. The flying personnel spent most of October in transition training with the B-24, training combat crews as well. Meanwhile, the ground echelon was acquiring, organizing and processing personnel and supplies at Wendover Field.

With the training complete and the personnel and supplies processed, the 308th Bomb Group and the 375th BS officially transferred to the Fourteenth Air Force in China early in 1943. The air echelon began flying its 'brand new' B-24D Liberators from Morrison Field, Florida on 15 February 1943. Traveling by way of the South Atlantic Transport Route though Central and South America, the Azores, Central Africa, Arabia and finally India; while the ground echelon traveled by ship across the Pacific Ocean.

The squadron arrived in India and made many trips over the 'Hump', (the mountainous terrain between India and China), to obtain gasoline, bombs, spare parts and other items needed to prepare for and sustain combat operations. The 375th supported Chinese ground forces by attacking airfields, coal yards, docks, oil refineries and fuel dumps in French Indochina. The squadron also mined rivers and ports, bombed maintenance shops and docks at Rangoon in Burma and attacked Japanese shipping in the East China Sea, the Formosa Straits, the South China Sea and the Gulf of Tonkin.

The squadron moved to India in June 1945, ferrying gasoline and supplies from there back into China. The unit sailed for the United States, where it was inactivated on 6 January 1946.

Strategic Air Command
Reactivated in Alaska in 1947 as a Strategic Air Command (SAC) weather reconnaissance squadron, it gathered meteorological information for combat readiness as an integrated part of strategic aerial reconnaissance. Weather recon, though, was a particularly loose term. There was a constant need for meteorological information, but weather flights were also a convenient cover for the more covert missions with RB-29 Superfortress photo-reconnaissance aircraft over the eastern frontier of the Soviet Union. The unit was inactivated in February 1951.

It was reactivated a few months later in October with new B-47E Stratojet swept-wing medium bombers, which were capable of flying at high subsonic speeds and primarily designed for penetrating the airspace of the Soviet Union.

By the late 1950s, the B-47 was considered to be reaching obsolescence, and was being phased out of SAC's strategic arsenal. B-47s began the transition to AMARC (also known as the Boneyard) at Davis-Monthan in July 1959 and the squadron became non-operational. It was inactivated on 25 June 1961.

Intercontinental Ballistic Missile Squadron
The squadron was reactivated and re-designated as a SAC LGM-25C Titan II ICBM Strategic Missile Squadron in 1962. It operated nine Titan II underground silos, construction of which began in 1960; the first (374–9), being operationally ready on 28 Oct 1963. The nine missile silos controlled by the 570th Strategic Missile Squadron remained on alert for over 20 years during the Cold War. A 'Broken Arrow' incident occurred at site 374-7 on 19 September 1980 which killed one airman and injured twenty-one personnel in the immediate vicinity (see below).

In October 1981, President Ronald Reagan announced that as part of the strategic modernization program, the Titan II systems were to be retired by 1 October 1987. Inactivation of the sites began on 17 March 1985 with 374-8 being the first; the last was on 15 Aug 1986 involving 374-1, 374–4 and 374-2. The squadron was inactivated the same day.

After removal from service, the silos had reusable equipment removed by Air Force personnel, and contractors retrieved salvageable metals before destroying the silos with explosives and filling them in. Access to the vacated control centers was blocked off. Missile sites were later sold off to private ownership after demilitarization. Today the remains of the sites are still visible through aerial imagery, in various states of use or dereliction.

Lineage

 * Constituted as the 374th Bombardment Squadron (Heavy) on 28 January 1942.
 * Activated on 15 April 1942.
 * Inactivated on 6 January 1946.


 * Re-designated the 374th Reconnaissance Squadron (Very Long Range, Weather) on 16 September 1947.
 * Activated on 15 October 1947.
 * Inactivated on 21 February 1951.


 * Re-designated the 374th Bombardment Squadron (Medium) on 4 October 1951.
 * Activated on 10 October 1951.
 * Discontinued and inactivated on 25 June 1961.


 * Re-designated the 375th Strategic Missile Squadron (ICBM-Titan) and activated 1 Sep 1962.
 * Inactivated on 15 Aug 1986.

Assignments

 * 308th Bombardment Group, 15 April 1942 – 6 January 1946.
 * 7th Weather (later 2107th Air Weather) Group, 15 October 1947 – 21 February 1951.
 * 308th Bombardment Group, 10 October 1951.
 * Attached to 21st Air Division, 10 October 1951 – 17 April 1952.


 * 308th Bombardment Wing, 16 June 1952 – 25 June 1961.
 * Not operational, 15 July 1959 – 25 June 1961.


 * 308th Strategic Missile Wing, 1 Sep 1962 – 15 Aug 1986.

Stations

 * Gowen Field, Idaho, 15 April 1942
 * Davis-Monthan Field, Arizona, 18 June 1942
 * Alamogordo Army Airfield, New Mexico, 24 July 1942
 * Davis-Monthan Field, Arizona, 28 August 1942
 * Wendover Field, Utah, 1 October 1942
 * Pueblo Army Air Base, Colorado, 1 December 1942 – 2 January 1943
 * Chengkung Airfield, China, 20 March 1943
 * Hsinching Airfield, China, 18 February 1945
 * Rupsi Airfield, India, 27 June – 14 October 1945


 * Camp Kilmer, New Jersey, 5–6 January 1946
 * Ladd Field, Alaska Territory, 15 October 1947
 * One flight operated from Fairfield-Suisun AAFId, California, and later from Shemya AFB, Alaska Territory, 15 October 1947 – 15 May 1949


 * Eielson AFB, Alaska Territory, 6 March 1949 – 21 February 1951
 * Forbes AFB, Kansas, 10 October 1951
 * Hunter AFB, Georgia, 17 April 1952
 * Plattsburgh AFB, New York, 15 July 1959 – 25 June 1961
 * Little Rock AFB, Arkansas, 1 Sep 1962 – 15 Aug 1986

Aircraft and missiles

 * B-18 Bolo, 1942
 * B-24 Liberator, 1942–1945
 * B/RB/WB-29 Superfortress, 1947–1951
 * C-47 Skytrain, 1947–1951
 * B-29 Superfortress, 1951–1952
 * B-47 Stratojet, 1953–1959
 * LGM-25C Titan II, 1962–1986


 * The squadron operated nine missile sites:


 * 374-1 (23 Dec 1963 – 15 Aug 1985), 1.1 mi ENE of Blackwell, Arkansas 35.22667°N, -92.82167°W
 * 374-2 (19 Dec 1963 – 15 Aug 1986), 2.0 mi NNE of Plummerville, AR 35.18861°N, -92.63056°W
 * 374-3 (19 Dec 1963 – 5 Aug 1986), 3.9 mi ENE of Hattieville, AR 35.31139°N, -92.72361°W
 * 374-4 (28 Dec 1963 – 15 Aug 1986), 1.4 mi NNE of Springfield, AR 35.2875°N, -92.54722°W
 * 374-5 (26 Dec 1963 – 19 May 1986), 3.3 mi ESE of Wooster, AR 35.16778°N, -92.3925°W
 * 374-6 (18 Dec 1963 – 25 Jun 1986), 3.8 mi SW of Guy, AR 35.29167°N, -92.38667°W
 * 374-7 (18 Dec 1963 – 21 Sep 1980)*, 3.3 mi NNE of Damascus, AR 35.41389°N, -92.39722°W
 * 374-8 (20 Dec 1963 – 17 Mar 1985), 4.3 mi SSW of Quitman, AR 35.32917°N, -92.24972°W
 * 374-9 (28 Oct 1963 – 3 Oct 1985), 2.5 mi SSW of Pearson, AR 35.40944°N, -92.14944°W

.* Location of 19 September 1980 Broken Arrow incident (see below)

Launch Complex 374-7 incident
An unfortunate sequence of events began on 18 September 1980 at Titan II Launch Complex 374-7.

A 374th SMS airman was adding pressure to the second stage oxidizer tank. During an incorrect application of a 9-pound wrench socket to the pressure cap, the airman accidentally dropped the socket, which fell onto the first stage and punctured the pressurized first stage fuel tank containing aerozine 50.

Aerozine 50 is hypergolic with the Titan II's oxidizer, nitrogen tetroxide; i.e., they spontaneously ignite on contact without a spark. Eventually, the crew evacuated the launch control center as military and civilian response teams arrived to tackle the hazardous situation. Early in the morning of 19 September, a two-man investigation team entered the silo. Because their vapor detectors indicated an explosive atmosphere, the two were ordered to evacuate.

At about 0300 hours, a tremendous explosion rocked the area. One possible trigger for the explosion was the collapse of the now-empty first stage fuel tank, allowing the rest of the missile (including the full oxidizer tank of the first stage) to fall and rupture, allowing the oxidizer to contact the fuel already in the silo. The initial explosion catapulted the 740-ton launcher closure door away from the silo and ejected the second stage and its warhead out of the silo. Once clear of the silo, the second stage exploded. The warhead's safety devices performed as designed and it did not explode. Twenty-one personnel in the immediate vicinity of the blast were injured. One member of the two-man silo reconnaissance team who had just emerged from the portal sustained injuries that proved fatal.

At daybreak, the Air Force retrieved the warhead and brought it within the confines of Little Rock AFB. During the recovery the Missile Wing Commander received strong support from other military units as well as Federal, state, and local officials. Arkansas’s young governor, Bill Clinton, played an important role in overseeing the proper deployment of state emergency resources.

Interestingly, the wing received some of its greatest accolades in the wake of the disaster. Perhaps realizing the public confidence had suffered a blow, wing personnel made a stronger effort to reach out to local communities. This effort won Air Force recognition in 1983, when the wing became the first missile wing ever to win the General Bruce K. Holloway humanitarian service trophy for the year 1982. The unit also earned the Omaha trophy for 1982, recognizing it as the best in SAC.