42nd Airborne Command And Control Squadron
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The 42d Electronic Combat Squadron is a
United States Air Force The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal ...
unit. Its current assignment is with the 55th Electronic Combat Group at
Davis–Monthan Air Force Base Davis–Monthan Air Force Base (DM AFB) is a United States Air Force base southeast of downtown Tucson, Arizona. It was established in 1925 as Davis–Monthan Landing Field. The host unit for Davis–Monthan AFB is the 355th Wing (355 WG) ass ...
, Arizona as a geographically separated unit from its parent wing, the 55th Wing at
Offutt Air Force Base Offutt Air Force Base is a U.S. Air Force base south of Omaha, adjacent to Bellevue in Sarpy County, Nebraska. It is the headquarters of the U.S. Strategic Command (USSTRATCOM), the 557th Weather Wing, and the 55th Wing (55 WG) of the Air ...
, Nebraska. The squadron is the Air Force's sole
Lockheed EC-130H Compass Call The EC-130H Compass Call is an electronic attack aircraft flown by the United States Air Force. Based on the Lockheed C-130 Hercules, the aircraft is heavily modified to disrupt enemy command and control communications, perform offensive counter ...
formal training unit.


Mission

Provides the 55th Electronic Combat Group with combat ready
Lockheed EC-130H Compass Call The EC-130H Compass Call is an electronic attack aircraft flown by the United States Air Force. Based on the Lockheed C-130 Hercules, the aircraft is heavily modified to disrupt enemy command and control communications, perform offensive counter ...
trained aircrews. Directs all EC-130H aircrew initial academic and flying qualification, difference and requalification training for 20 different aircrew specialties with more than 200 aircrew students trained annually. Provides registrar support to students. Maintains quality control for all aspects of contracted aircrew training and manages courseware development for 17 Air Combat Command-verified syllabi. Provides the group with simulator support for both continuation and initial qualification training.


History

Constituted as 42 Reconnaissance Squadron, Very Long Range, Photographic, on 24 October 1945. Activated on 7 November 1945 at
Smoky Hill Army Air Field Salina Regional Airport , formerly Salina Municipal Airport, is three miles southwest of Salina, Kansas, United States. The airport is owned by the Salina Airport Authority. It is used for general aviation, with service by one passenger airline, ...
,
Kansas Kansas () is a state in the Midwestern United States. Its capital is Topeka, and its largest city is Wichita. Kansas is a landlocked state bordered by Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to the ...
. Established under
VIII Bomber Command 8 (eight) is the natural number following 7 and preceding 9. In mathematics 8 is: * a composite number, its proper divisors being , , and . It is twice 4 or four times 2. * a power of two, being 2 (two cubed), and is the first number of t ...
,
Continental Air Forces Continental Air Forces (CAF) was a United States Army Air Forces major command, active 1944–1946. It was tasked with combat training of bomber and fighter personnel, and for Continental United States (CONUS) air defense after the Aircraft Warn ...
as a very long-range strategic reconnaissance squadron. Equipped with
B-29 Superfortress The Boeing B-29 Superfortress is an American four-engined propeller-driven heavy bomber, designed by Boeing and flown primarily by the United States during World War II and the Korean War. Named in allusion to its predecessor, the B-17 Fl ...
bombers converted into F-13 reconnaissance/mapping configuration. Was designated to operate from Alaska, however squadron suffered from lack of personnel due to demobilization after the end of
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
, never became fully operational and was inactivated in August 1946.


Cold War European operations

Reactivated as part of the
United States Air Forces in Europe United may refer to: Places * United, Pennsylvania, an unincorporated community * United, West Virginia, an unincorporated community Arts and entertainment Films * ''United'' (2003 film), a Norwegian film * ''United'' (2011 film), a BBC Two fi ...
in March 1954 at
Spangdahlem Air Base Spangdahlem Air Base (IATA: SPM, ICAO: ETAD, former code EDAD) is a NATO air base with the USAF as a tenant constructed between 1951 and 1953 and located near the small German town of Spangdahlem, approximately 30 km NNE of the city of Trier ...
, West Germany. Equipped with
Douglas RB-26 Invader The Douglas A-26 Invader (designated B-26 between 1948 and 1965) is an American twin-engined light bomber and ground attack aircraft. Built by Douglas Aircraft Company during World War II, the Invader also saw service during several major ...
reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmisher ...
aircraft, painted in black to perform night reconnaissance which were transferred from the 1st Tactical Reconnaissance Squadron when the 1st received
Martin RB-57A Canberra The Martin B-57 Canberra is an American-built, twin-engined tactical bomber and reconnaissance aircraft that entered service with the United States Air Force (USAF) in 1953. The B-57 is a license-built version of the British English Electric ...
s. In 1956 the B-26s were sent to reclamation and the squadron received twelve
Douglas RB-66C Destroyer The Douglas B-66 Destroyer is a light bomber that was designed and produced by the American aviation manufacturer Douglas Aircraft Company. The B-66 was developed for the United States Air Force (USAF) and is heavily based upon the United Stat ...
s. The RB-66C was a specialized electronic reconnaissance and electronic countermeasures aircraft designed for jamming Soviet RADAR. Its mission was to fly with tactical fighter and fighter bomber aircraft and provide an aerial defense. An extensive suite of specialized equipment was fitted to locate and identify enemy radar emissions. Additional ECM equipment was carried in wingtip pods. Chaff dispensing pods could be carried underneath the wing outboard of the engine nacelles. In addition, it was fitted with a removable in flight refueling probe attached to the right side of the forward fuselage. In 1959 the squadron moved to the UK as part of a USAFE realignment. Its parent
10th Tactical Reconnaissance Wing The 10th Air Base Wing (10 ABW) is a non-flying United States Air Force unit that is the host wing for the United States Air Force Academy (USAFA) in Colorado Springs, Colorado. The Wing provides all base-level support activities to the Academy ...
was assigned to
RAF Alconbury Royal Air Force Alconbury or more simply RAF Alconbury is an active Royal Air Force station near Huntingdon, England. The airfield is in the civil parish of The Stukeleys, close to the villages of Great Stukeley, Little Stukeley, and Alconbury. ...
. A shortage of facilities at Alconbury led to the 42d being stationed at
RAF Chelveston Royal Air Force Chelveston, or more simply RAF Chelveston, is a former Royal Air Force station located on the south side of the B645 (former A45 road), east of Wellingborough, near the village of Chelveston in Northamptonshire, England. Duri ...
, about 20 miles west of Alconbury, where it remained as a detachment of the 10th TRW. In 1962 the runway at Chevelston was closed, and the squadron operated out of Toul-Rosieres AB, France, where it operated for a few years as Detachment 1, 10th Tactical Reconnaissance Wing. On 10 March 1964, a wing RB-66B took off from Toul for a mission over West Germany. Because of an equipment malfunction that was undetected by the crew, the plane continued its flight to East Germany and was shot down. The crew ejected safely, but was taken prisoner, although they were released before the end of the month. This incident prompted USAFE to institute a buffer zone, where special procedures were required for aircraft flying near the eastern border of West Germany. Starting in April 1964, thirteen of the squadron's RB-66Bs began to be modified under Project Brown Cradle, to update their electronic warfare equipment and make other modifications. By 1965 the aircraft modification had been completed. However, the service of the Brown Cradle aircraft with the squadron was short. In December five of the aircraft deployed to
Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...
, and in May 1966, the remaining eight aircraft joined them.Knaack, p. 439 These rotational deployments to France continued until October 1965 with the activation of the 25th Tactical Reconnaissance Wing at Chambley-Bussieres Air Base and the 42d being permanently assigned to the 25th Wing. With France's withdrawal from NATO's integrated military organization in 1966, Chambley was closed and the 25th Wing was inactivated. The specially-equipped EB-66C's of the 42d and their aircrews were sent directly to
Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...
for use over the skies of North Vietnam and the squadron was inactivated.


Vietnam War

Reactivated in 1968 at
Takhli Royal Thai Air Base Takhli Royal Thai Air Force Base is a Royal Thai Air Force (RTAF) facility in central Thailand, approximately 144 miles (240 km) northwest of Bangkok in Takhli District, Nakhon Sawan Province. Units Takhli is the home of the Royal Tha ...
under the 355th Tactical Fighter Wing. The squadron carried out electronic warfare operations over North Vietnam and Laos, locating and identifying North Vietnamese radar sites as well as along the Ho Chi Minh trail in Laos that directed missiles and AAA fire, so that strike aircraft could avoid them. The RB-66C had no offensive capability, so it could not attack the radar sites directly. Squadron was transferred to
Korat Royal Thai Air Force Base Korat Royal Thai Air Force Base is a base of the Royal Thai Air Force (RTAF) in northeast Thailand, approximately 200 km (125 mi) northeast of Bangkok and about 4 km (2.5 mi) south of the centre of the city of Nakhon Ratchasi ...
in August 1970. Continued operations until the end of hostilities in January 1973, remained in Thailand until being inactivated in March 1974.Lt.Col.
Iceal Hambleton Iceal E. "Gene" Hambleton (November 16, 1918 – September 19, 2004) was a United States Air Force navigator who was shot down over South Vietnam during the 1972 Easter Offensive. He was aboard an EB-66 aircraft whose call sign was Bat 21. As the ...
, a navigator aboard an EB-66 who was shot down during the
Easter Offensive The Easter Offensive, also known as the 1972 spring–summer offensive ('' vi, Chiến dịch Xuân–Hè 1972'') by North Vietnam, or the red fiery summer (') as romanticized in South Vietnamese literature, was a military campaign conducted b ...
and spent 11½ days behind
enemy lines The line of battle is a tactic in naval warfare in which a fleet of ships forms a line end to end. The first example of its use as a tactic is disputed—it has been variously claimed for dates ranging from 1502 to 1652. Line-of-battle tacti ...
, was a member of the squadron. His
rescue Rescue comprises responsive operations that usually involve the saving of life, or the urgent treatment of injuries after an accident or a dangerous situation. Tools used might include search and rescue dogs, mounted search and rescue ho ...
was the "largest, longest, and most complex search-and-rescue" operation during the entire
Vietnam War The Vietnam War (also known by #Names, other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vie ...
. The rescue was dramatized in the movie
Bat*21 ''Bat*21'' is a 1988 American war film directed by Peter Markle, and adapted from the book by William C. Anderson, novelist and retired United States Air Force colonel. Set during the Vietnam War, the film is a dramatization based upon the rescu ...
. Zimmerman, p. 320


Eldorado Canyon and Desert Storm

Reactivated in 1983 with General Dynamics EF-111A Ravens at
RAF Upper Heyford RAF Upper Heyford was a Royal Air Force station located north-west of Bicester near the village of Upper Heyford, Oxfordshire, England. In the Second World War the airfield was used by Bomber Command. During the Cold War, Upper Heyford was one ...
, England, the replacement for the Douglas EB-66 electronic warfare aircraft. Performed ECM operations for NATO aircraft. Provided electronic countermeasures to US Navy aircraft for combat in Libya, 15 April 1986 as part of
Operation El Dorado Canyon The 1986 United States bombing of Libya, code-named Operation El Dorado Canyon, consisted of air strikes by the United States against Libya on Tuesday 15 April 1986. The attack was carried out by the U.S. Air Force (USAF), U.S. Navy and U.S. M ...
. During that mission, the 42d provided three EF-111As plus two spare aircraft to jam the Libyan radar network. Deployed flights to Turkey and Saudi Arabia in 1991 as part of
Operation Desert Shield The Gulf War was a 1990–1991 armed campaign waged by a Coalition of the Gulf War, 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Ba'athist Iraq, ...
; engaged in combat operations in 1991 as part of
Operation Desert Storm Operation or Operations may refer to: Arts, entertainment and media * ''Operation'' (game), a battery-operated board game that challenges dexterity * Operation (music), a term used in musical set theory * ''Operations'' (magazine), Multi-Man ...
. Eighteen EF-111A Ravens flew over 900 sorties. None were lost in combat, but one was lost in a non-combat related accident and both crew members were killed. The 42d was even credited with a "kill" during Desert Storm. On the night of 17 January 1991, an Iraqi
Mirage F.1 The Dassault Mirage F1 is a French fighter and attack aircraft designed and manufactured by Dassault Aviation. It was developed as a successor to the popular Mirage III family. During the 1960s, Dassault commenced development of what would b ...
flew into the ground while chasing EF-111A serial number 66-16. Even though the Raven was unarmed and had no air-to-air capability, the Raven crew was given credit for the kill. This was originally believed to be true but after review of AWACS tapes and other data credit for the claim was withdrawn. The official award for the F.1 Mirage kill went to Capt Robert E. Graeter, 33 TFW, Special order CCAF SO GA-1, 1991, as a Maneuvering kill. Inactivated in 1992 as part of the post Cold War drawdown of the USAF, its aircraft reassigned to the
429th Electronic Combat Squadron The 429th Electronic Combat Squadron is an inactive United States Air Force unit. It was first activated in August 1943 and participated in conflicts including World War II, the Korean War, the Cuban Missile Crisis, and the Vietnam War. The 4 ...
at
Cannon Air Force Base Cannon Air Force Base is a United States Air Force base, located approximately southwest of Clovis, New Mexico. It is under the jurisdiction of Air Force Special Operations Command (AFSOC). The host unit at Cannon is the 27th Special Operatio ...
, New Mexico.


Airborne Command and Control (ABCCC) Operations

In 1994, the squadron was reactivated and received the personnel and aircraft from the
7th Airborne Command and Control Squadron The 7th Expeditionary Airborne Command and Control Squadron is part of the 379th Air Expeditionary Wing at Al Udeid Air Base, Qatar. It operates the E-8 Joint STARS aircraft, conducting airborne command and control missions. The squadron has ...
which provided procedural air control via the Airborne Battlefield Command and Control Center (ABCCC). The 7th Squadron moved on paper to
Offutt Air Force Base Offutt Air Force Base is a U.S. Air Force base south of Omaha, adjacent to Bellevue in Sarpy County, Nebraska. It is the headquarters of the U.S. Strategic Command (USSTRATCOM), the 557th Weather Wing, and the 55th Wing (55 WG) of the Air ...
, Nebraska and assumed a new mission, the Airborne Command Post "Looking Glass" mission in support of nuclear command and control for United States Strategic Command, as part of this mission, the 7th began flying
Boeing EC-135 The Boeing EC-135 is a retired family of command and control aircraft derived from the Boeing C-135 Stratolifter. During the Cold War, the EC-135 was best known for being modified to perform the Looking Glass mission where one EC-135 was always ...
aircraft. The EC-130E ABCCC consisted of seven aircraft. The EC-130E is a modified C-130 Hercules; aircraft designed to carry the AN/USC-48 Airborne Battlefield Command and Control Center Capsules (ABCCC III). While functioning as a direct extension of ground-based command and control authorities, the primary mission was to provide flexibility in the overall control of tactical air resources. In addition, to maintain positive control of air operations, ABCCC provided communications to higher headquarters, including national command authorities, in both peace and wartime environments. The ABCCC provided unified and theater commanders the capability for combat operations during war, contingencies, exercises, and other missions. A highly trained force of mission ready crew members and specially equipped EC-130E aircraft to support worldwide combat operations. Mission roles include airborne extensions of the Air Operations Center and Airborne Air Support Operations Center for command and control of offensive air support operations; and airborne on-scene command for special operations such as airdrops or evacuations. In September 2002, following 2,186 days (5 years, 11 months, 25 days) of continuous deployed operations (July 15, 1993 to July 10, 1999) to
Aviano Air Base Aviano Air Base ( it, Base aerea di Aviano) is a base in northeastern Italy, in the Friuli-Venezia Giulia region. It is located in the Aviano municipality, at the foot of the Carnic Pre-Alps or Southern Carnic Alps, about from Pordenone. Th ...
supporting
Operation Deny Flight Operation Deny Flight was a North Atlantic Treaty Organization (NATO) operation that began on 12 April 1993 as the enforcement of a United Nations (UN) no-fly zone over Bosnia and Herzegovina. The United Nations and NATO later expanded the mis ...
,
Operation Deliberate Force Operation Deliberate Force was a sustained air campaign conducted by the North Atlantic Treaty Organization (NATO), in concert with the United Nations Protection Force (UNPROFOR) ground operations, to undermine the military capability of the ...
, Operation Decisive Edge,
Operation Deliberate Guard D, or d, is the fourth letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''dee'' (pronounced ), plural ''dees''. History The ...
, Operation Deliberate Forge and
Operation Allied Force The North Atlantic Treaty Organization (NATO) carried out an aerial bombing campaign against the Federal Republic of Yugoslavia during the Kosovo War. The air strikes lasted from 24 March 1999 to 10 June 1999. The bombings continued until an a ...
, the unit was inactivated. Some of the aircraft were retired, some assumed new roles, missions for the U.S. Air Force. All of the capsules, save one, were scrapped.


Compass Call training

It was reactivated in 2006 as part of the
Global War on Terror The war on terror, officially the Global War on Terrorism (GWOT), is an ongoing international counterterrorism military campaign initiated by the United States following the September 11 attacks. The main targets of the campaign are militant I ...
in order to provide training for EC-130H Compass Call squadrons at Davis-Monthan Air Force Base. Since 2006, the 42nd has served as the 'schoolhouse' squadron for the 41st and
43d Electronic Combat Squadron The 43d Electronic Combat Squadron is a United States Air Force unit. Its current assignment is with the 55th Electronic Combat Group, being stationed as a tenant unit at Davis-Monthan Air Force Base, Arizona as a geographically separated uni ...
s.


Lineage

* Constituted as the 42d Reconnaissance Squadron, Very Long Range, Photographic on 24 October 1945 : Activated on 7 November 1945 : Inactivated on 19 August 1946 * Redesignated 42d Tactical Reconnaissance Squadron, Electronics and Weather on 11 December 1953 : Activated on 18 March 1954 : Redesignated 42d Tactical Reconnaissance Squadron, Electronic on 1 July 1965 : Discontinued and inactivated on 22 August 1966 * Redesignated 42d Tactical Electronic Warfare Squadron and activated on 15 December 1967 (not organized) : Organized on 1 January 1968 : Inactivated on 15 March 1974 * Redesignated 42d Electronic Combat Squadron on 23 May 1983 : Activated on 1 July 1983 : Inactivated on 1 July 1992 * Redesignated 42d Airborne Command and Control Squadron on 24 June 1994 : Activated on 1 July 1994 : Inactivated on 30 September 2002 * Redesignated 42d Electronic Combat Squadron on 9 March 2006 : Activated on 10 March 2006


Assignments

* VIII Bomber Command, 7 November 1945 *
17th Bombardment Operational Training Wing 17 (seventeen) is the natural number following 16 and preceding 18. It is a prime number. Seventeen is the sum of the first four prime numbers. In mathematics 17 is the seventh prime number, which makes seventeen the fourth super-prime, as s ...
, c. 31 January 1946 *
Second Air Force The Second Air Force (2 AF; ''2d Air Force'' in 1942) is a USAF numbered air force responsible for conducting basic military and technical training for Air Force enlisted members and non-flying officers. In World War II the CONUS unit defended ...
, 18 February 1946 *
Fifteenth Air Force The Fifteenth Air Force (15 AF) is a numbered air force of the United States Air Force's Air Combat Command (ACC). It is headquartered at Shaw Air Force Base. It was reactivated on 20 August 2020, merging the previous units of the Ninth Air Force ...
, 31 March-19 August 1946 * 10th Tactical Reconnaissance Group, 18 March 1954 *
10th Tactical Reconnaissance Wing The 10th Air Base Wing (10 ABW) is a non-flying United States Air Force unit that is the host wing for the United States Air Force Academy (USAFA) in Colorado Springs, Colorado. The Wing provides all base-level support activities to the Academy ...
, 8 December 1957 * 25th Tactical Reconnaissance Group, 1 July 1965 * 25th Tactical Reconnaissance Wing, 1 October 1965 – 22 August 1966 *
Pacific Air Forces Pacific Air Forces (PACAF) is a Major Command (MAJCOM) of the United States Air Force and is also the air component command of the United States Indo-Pacific Command (USINDOPACOM). PACAF is headquartered at Joint Base Pearl Harbor–Hickam (fo ...
, 15 December 1967 (not organized) * 355th Tactical Fighter Wing, 1 January 1968 : Attached to 388th Tactical Fighter Wing, c. 21 September – 14 October 1970 * 388th Tactical Fighter Wing, 15 October 1970 – 15 March 1974 * 20th Tactical Fighter Wing, 1 July 1983 *
66th Electronic Combat Wing The 66th Air Base Wing is an inactive United States Air Force wing that was last active in September 2010 at Hanscom Air Force Base, Massachusetts, where it had served as the host organization since 1994. It was replaced at Hanscom by the small ...
: Attached to 20th Tactical Fighter Wing, 1 June 1985 * 20th Tactical Fighter Wing (later 20th Fighter Wing), 25 January 1991 – 1 July 1992 * 355th Operations Group, 1 July 1994 – 30 September 2002 * 55th Electronic Combat Group, 10 March 2006 – present


Stations

*
Smoky Hill Army Air Field Salina Regional Airport , formerly Salina Municipal Airport, is three miles southwest of Salina, Kansas, United States. The airport is owned by the Salina Airport Authority. It is used for general aviation, with service by one passenger airline, ...
, Kansas, 7 November 1945 – 19 August 1946 * Spangdahlem Air Base, West Germany, 18 March 1954 *
RAF Chelveston Royal Air Force Chelveston, or more simply RAF Chelveston, is a former Royal Air Force station located on the south side of the B645 (former A45 road), east of Wellingborough, near the village of Chelveston in Northamptonshire, England. Duri ...
, England, c. 20 August 1959 * Toul-Rosières Air Base, France, 1 August 1962 : Deployed at Chambley-Bussières Air Base, France, 15 May-9 October 1963 * Chambley-Bussières Air Base, France, 1 July 1965 – 22 August 1966 * Takhli Royal Thai Air Force Base, Thailand, 1 January 1968 * Korat Royal Thai Air Force Base, Thailand, 22 September 1970 – 15 March 1974 * RAF Upper Heyford, England, 1 July 1983 – 1 July 1992 * Davis-Monthan Air Force Base, Arizona, 1 July 1994 – 30 September 2002 * Davis-Monthan Air Force Base, Arizona, 10 March 2006 – present


Aircraft

*
Boeing B-29 Superfortress The Boeing B-29 Superfortress is an American four-engined propeller-driven heavy bomber, designed by Boeing and flown primarily by the United States during World War II and the Korean War. Named in allusion to its predecessor, the B-17 Fl ...
, 1945–1946 * Douglas RB-26 Invader, 1954–1957 * T/WT-33 Shooting Star 1955–1957 * Douglas RB-66 Destroyer 1956–1965 : Douglas WB-66 Destroyer 1957–1960 : Douglas B-66 Destroyer 1960–1966 : Douglas EB-66 Destroyer 1968–1974 * General Dynamics EF-111A Raven 1984–1992; affectionately known as the 'Spark-Vark' * Lockheed EC-130E ABCCC 1994–2002 * Lockheed EC-130H Compass Call 2006–present


References


Notes

; Explanatory Notes ; Footnotes


Bibliography

* * Additional reading * {{cite book, editor=Maurer, Maurer, title=Combat Squadrons of the Air Force, World War II, orig-year=1969, url= http://media.defense.gov/2010/Dec/02/2001329899/-1/-1/0/AFD-101202-002.pdf, edition= reprint, year=1982, publisher=Office of Air Force History, location=Washington, DC, isbn=0-405-12194-6, oclc=72556, lccn=70605402 USAF Electronic Combat Squadron 0042
042 4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5. It is the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures. In mathematics Four is the smallest c ...