Gimpo Airport
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Gimpo International Airport (), commonly known as Gimpo Airport , formerly rendered in English as Kimpo International Airport, is located in the far western end of
Seoul Seoul (; ; ), officially known as the Seoul Special City, is the capital and largest metropolis of South Korea.Before 1972, Seoul was the ''de jure'' capital of the Democratic People's Republic of Korea (North Korea) as stated iArticle 103 ...
, some west of the Central District of Seoul. Gimpo was the main international airport for Seoul and South Korea before being replaced by
Incheon International Airport Incheon International Airport (IIA; ) (sometimes referred to as Seoul–Incheon International Airport) is the largest airport in South Korea. It is the primary airport serving the Seoul Capital Area and one of the largest and busiest airports ...
in 2001. It now functions as Seoul's secondary airport. In 2015, over 23 million passengers used the airport, making it the third-largest airport in Korea, as it has been surpassed by
Jeju International Airport Jeju International Airport () is the second largest airport in South Korea, just behind Incheon Airport in Incheon. It is located in the city of Jeju. The airport opened in 1968. Jeju International Airport serves many mainland destinations in ...
. The airport is located south of the Han River in western Seoul. The name "Gimpo" comes from the nearby city of
Gimpo Gimpo () is a city in Gyeonggi Province, South Korea. It borders Incheon, with which it shares the South Korean side of the Han River estuary, as well as Seoul and the lesser cities of Paju and Goyang. North Korea is across the Han River. The cu ...
, of which the airport used to be a part. On 29 November 2003, scheduled services between Gimpo and Haneda Airport in
Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 ...
resumed. Services to Shanghai Hongqiao International Airport resumed on 28 October 2007. Services to
Kansai International Airport Kansai International Airport ( ja, 関西国際空港, Kansai Kokusai Kūkō) commonly known as is the primary international airport in the Greater Osaka Area of Japan and the closest international airport to the cities of Osaka, Kyoto, and K ...
in
Osaka is a designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the third most populous city in Japan, following Special wards of Tokyo and Yokohama. With a population of 2. ...
, Japan, started on 26 October 2008. Services to
Beijing Capital International Airport Beijing Capital International Airport is one of two international airports serving Beijing, the other one being Beijing Daxing International Airport (PKX). It is located northeast of Beijing's city center, in an exclave of Chaoyang District ...
started on 1 July 2011. Services to Taipei Songshan Airport started on 30 April 2012.


History

The airfield was built in 1939 during the Japanese Imperial period as an Imperial Army base. The runways were built on a bed of rocks manually hauled by Korean laborers from Kaihwasan and Yangchan, several miles from the base. Then known as Keijo New Airfield (京城新飛行場), Kimpo was constructed with four runways to supplement the much smaller Keijo Airfield (京城飛行場), which was later known as
Yeouido Airport Yeouido Airport was an international airport in Yeouido, Seoul, South Korea. It operated as an international airport from 1929 to 1958, and thereafter as a military base until 1971. History The Imperial Japanese Army constructed an airstrip on Y ...
.


Korean War

Gimpo played a major role during the
Korean War , date = {{Ubl, 25 June 1950 – 27 July 1953 (''de facto'')({{Age in years, months, weeks and days, month1=6, day1=25, year1=1950, month2=7, day2=27, year2=1953), 25 June 1950 – present (''de jure'')({{Age in years, months, weeks a ...
, and the USAF designated the airfield as Kimpo Air Base or K-14. North Korean forces attacked South Korea on 25 June 1950 starting the Korean War. During one of the first
Korean People's Air Force The Korean People's Army Air and Anti-Air Force (KPAAF; ; Hanja: 朝鮮人民軍 航空 및 反航空軍 ) is the unified military aviation force of North Korea. It is the second largest branch of the Korean People's Army comprising an estimated ...
(KPAF) attacks on 25 June, a
Military Air Transport Service The Military Air Transport Service (MATS) is an inactive Department of Defense Unified Command. Activated on 1 June 1948, MATS was a consolidation of the United States Navy's Naval Air Transport Service (NATS) and the United States Air Force's ...
C-54 Skymaster The Douglas C-54 Skymaster is a four-engined transport aircraft used by the United States Army Air Forces in World War II and the Korean War. Like the Douglas C-47 Skytrain derived from the DC-3, the C-54 Skymaster was derived from a civilian a ...
was destroyed on the ground at Gimpo. On 27 June, US naval and air forces began evacuating 748 US diplomats, military dependents, and civilians by air transport from Kimpo and Suwon Airfield. On the afternoon of 27 June, five F-82 Twin Mustangs of the 68th Fighter Squadron and
339th Fighter Squadron 339th may refer to: *339th Aviation Detachment, United States Army Aviation Branch *339th Bombardment Group, unit of the New York Air National Guard *339th Bombardment Squadron, inactive United States Air Force unit *339th Fighter Group, unit of th ...
were escorting four
C-54 Skymaster The Douglas C-54 Skymaster is a four-engined transport aircraft used by the United States Army Air Forces in World War II and the Korean War. Like the Douglas C-47 Skytrain derived from the DC-3, the C-54 Skymaster was derived from a civilian a ...
aircraft out of Kimpo when the C-54s were attacked by five KPAF Lavochkin La-7 fighters. In the subsequent dogfights, three LA-7s were shot down for the loss of no US aircraft in the first air battle of the war. Later that day, four F-80Cs of the
35th Fighter-Bomber Squadron Military units *35th Fighter Wing, an air combat unit of the United States Air Force *35th Infantry Division (United States), a formation of the National Guard since World War I *35th Infantry Regiment (United States), a regiment created on 1 July 1 ...
shot down four Ilyushin Il-10s for no losses over Gimpo in the USAF's first jet-aircraft victory. Gimpo was captured by the KPA shortly after the capture of Seoul on 28 June 1950. On 29 June, eight B-29s of the
19th Bomb Group The 19th Operations Group (19 OG) is the operational flying component of the United States Air Force 19th Airlift Wing, stationed at Little Rock Air Force Base, Arkansas. Equipped with the Lockheed C-130 Hercules, the group provides part of Ai ...
bombed Gimpo and the Seoul railyards. By July, the KPAF were using the base for attacks on UN forces; on 10 July, seven Yak-7s were hidden at Gimpo and used in strikes against UN positions at Cheongju. The next day, they surprised and damaged several Lockheed F-80s in the area. On 15 July, the US launched an attack on Gimpo, destroying two or three of the seven Yak-7s there and damaging the runway. On 5 August
5th Air Force The Fifth Air Force (5 AF) is a numbered air force of the United States Air Force Pacific Air Forces (PACAF). It is headquartered at Yokota Air Base, Japan. It is the U.S. Air Force's oldest continuously serving Numbered Air Force. The organiza ...
fighters strafed and bombed Gimpo, destroying 9 aircraft and damaging 9 others. Following the
Inchon landings The Battle of Incheon (), also spelled Battle of Inchon, was an amphibious invasion and a battle of the Korean War that resulted in a decisive victory and strategic reversal in favor of the United Nations Command (UN). The operation involved s ...
on 15 September 1950, the
2nd Battalion 5th Marines 2d Battalion 5th Marines (2/5 or "Two Five") is an infantry battalion in the United States Marine Corps consisting of approximately 800 Marines and Sailors. They are based out of Marine Corps Base Camp Pendleton, California and fall under the comm ...
was ordered to seize Gimpo on 17 September. Gimpo was defended by a conglomeration of half-trained fighting men and service forces, and by the morning of 18 September, the Marines had secured the airfield. The airfield was in excellent shape as the North Koreans had not had time to do any major demolition. On 19 September, the
U.S. Army Corps of Engineers , colors = , anniversaries = 16 June (Organization Day) , battles = , battles_label = Wars , website = , commander1 = ...
repaired the local railroad up to 8 miles (13 km) inland and 32 C-54 transport planes began flying in gasoline and ordnance.
VMF-212 Marine Fighter Attack Squadron 212 (VMFA-212) was a United States Marine Corps F/A-18 Hornet squadron. Most recently known as the "Lancers", the squadron was last based at Marine Corps Air Station Iwakuni, Japan and fell under the command of Mar ...
was one of the first units to operate from Gimpo before moving forward to
Yonpo Airfield Yonpo Airfield, also known as Yonpo Air Base or K-27 Air Base, is an airport near Hamhung, South Hamgyong Province, North Korea. History Korean War On 2 July 1950 the 19th Bombardment Group launched a strike on Yonpo Airfield based on faulty i ...
. On 25 September, the 811th Engineer Aviation Battalion began repairing bomb damage on the asphalt runway at Gimpo and covering it with
Marston matting Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the ...
. On 6 October, the USAF took control of Gimpo from the USMC. Following the Chinese Third Phase Campaign and the defeat of UN Forces at the 38th parallel, on 5 January 1951, General Ridgway ordered the evacuation of Seoul and the withdrawal of UN forces to a new defensive line along the 37th parallel. Units based at Gimpo were withdrawn to the south and facilities were destroyed to prevent their use by Chinese and North Korean forces. UN forces resumed the offensive again in late January 1951 and launched Operation Thunderbolt on 25 January, with the aim of pushing Chinese and North Korean forces back north of the Han River. By 10 February 1951, UN forces once again had control of Gimpo. USAF units based at Gimpo (Kimpo) included: *
4th Fighter Wing The 4th Fighter Wing is a United States Air Force unit assigned to the Air Combat Command's Ninth Air Force. It is stationed at Seymour Johnson Air Force Base, North Carolina, where it is also the host unit. The wing is one of two Air Force uni ...
operating F-86s from 23 August 1951 to 1 October 1954, subordinate units included: ** 334th Fighter-Interceptor Squadron ** 335th Fighter-Interceptor Squadron ** 336th Fighter-Interceptor Squadron *
8th Fighter-Bomber Wing 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 ...
from 25 June to 23 August 1951 * 51st Fighter-Interceptor Wing from 10 October 1950 to 10 December 1950, subordinate units included: **
16th Fighter-Interceptor Squadron 16 (sixteen) is the natural number following 15 and preceding 17. 16 is a composite number, and a square number, being 42 = 4 × 4. It is the smallest number with exactly five divisors, its proper divisors being , , and . In English speech, ...
operating F-80s from 22 October 1950 to 3 January 1951 ** 25th Fighter-Interceptor Squadron operating F-80s from October 1950 to November 1951 * 67th Tactical Reconnaissance Group from 20 August 1951 to 6 December 1954, subordinate units included: **
12th Tactical Reconnaissance Squadron 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1 ...
operating RB-26Bs **
15th Tactical Reconnaissance Squadron 15 (fifteen) is the natural number following 14 and preceding 16. Mathematics 15 is: * A composite number, and the sixth semiprime; its proper divisors being , and . * A deficient number, a smooth number, a lucky number, a pernicious nu ...
operating RF-80s and RF-86s ** 45th Tactical Reconnaissance Squadron operating F-51s * 68th Fighter Squadron operating F-82s from 30 November 1950 to March 1951 and from 27 June to 24 August 1951 * 80th Fighter Squadron operating P-51s from 27 October to 20 December 1950 Other UN units based at Gimpo (Kimpo) included: *
No. 77 Squadron RAAF No. 77 Squadron is a Royal Australian Air Force (RAAF) squadron headquartered at RAAF Base Williamtown, New South Wales. It is controlled by No. 81 Wing, and equipped with Lockheed Martin F-35 Lightning II multi-role fighters. The squad ...
operating Gloster Meteors from June 1951 On 21 September 1953, North Korean pilot No Kum-Sok defected in his MiG-15, landing at Gimpo. File:World War II Fighter Planes Kimpo, Korea 1945.jpg, Mitsubishi Ki-51s at Kimpo, October 1945 File:Wreckage of big transport which North Koreans hit while it was on Kimpo Airfield, is again in friendly hands, upon recapture of field HD-SN-99-03159.jpg, Wreckage of a
C-54 The Douglas C-54 Skymaster is a four-engined transport aircraft used by the United States Army Air Forces in World War II and the Korean War. Like the Douglas C-47 Skytrain derived from the DC-3, the C-54 Skymaster was derived from a civilian a ...
destroyed on ground by KPAF fighters, June 1950 File:Il-10 damaged Kimpo Korea 1950.jpeg, Captured KPAF Ilyushin Il-10, September 1950 File:F51s K14 Kimpo Airfield Korea Oct 1950.jpg, F51s at Kimpo (K14) Airfield, October 1950 File:Meteor F8 77 Sqn RAAF at Kimpo c1952.jpg,
No. 77 Squadron RAAF No. 77 Squadron is a Royal Australian Air Force (RAAF) squadron headquartered at RAAF Base Williamtown, New South Wales. It is controlled by No. 81 Wing, and equipped with Lockheed Martin F-35 Lightning II multi-role fighters. The squad ...
Gloster Meteor, 1952 File:J47 engine change on F-86E at Kimpo 1952.jpg, Engine change on an F-86E, 1952 File:MiG-15bis Kimpo Sep 1953.jpeg, MiG-15, 1953


International era

In 1958, the airport was redesignated as the Gimpo international airport of Seoul by a presidential decree, completely replacing the existing
Yeouido Airport Yeouido Airport was an international airport in Yeouido, Seoul, South Korea. It operated as an international airport from 1929 to 1958, and thereafter as a military base until 1971. History The Imperial Japanese Army constructed an airstrip on Y ...
. Following the construction of Gimpo, Yeouido Airport was demolished. Gimpo soon became the main airport of Seoul, and of South Korea in general. In 1971, a new, combined domestic and international terminal was opened. However, following the opening of what was known as Terminal 1 in 1977, the original combined terminal was converted to domestic flights only. Later, Terminal 2 was opened due to the
Olympic Games The modern Olympic Games or Olympics (french: link=no, Jeux olympiques) are the leading international sporting events featuring summer and winter sports competitions in which thousands of athletes from around the world participate in a var ...
. Gradually, Gimpo began to have more flights than it was capable of handling. After about 1980, it experienced numerous problems due to its lack of space for expansion. An additional problem was South Korea's overnight curfew (midnight to 4 am), a security measure that was in effect for decades. The curfew, which severely limited the airport's night operations, was finally abolished in 1982. Eventually, the South Korean government decided to build a new airport. The facility was initially planned to be in Cheongju, 124 km away from Seoul, but that idea was strongly opposed by the citizens of Seoul and Gyeonggi Province, due to the inconvenience it would pose to them. (It would have been farther from Seoul than the 80-km distance between
Viracopos Airport Viracopos – Campinas International Airport (sometimes referred to as São Paulo/Campinas or São Paulo/Viracopos) is an international airport serving the municipality of Campinas, São Paulo State, Brazil. On 6 January 1987, the airport name w ...
in
Campinas Campinas (, ''Plains'' or ''Meadows'') is a Brazilian municipality in São Paulo State, part of the country's Southeast Region. According to the 2020 estimate, the city's population is 1,213,792, making it the fourteenth most populous Brazilian ...
, Brazil, and the city of
São Paulo São Paulo (, ; Portuguese for 'Saint Paul') is the most populous city in Brazil, and is the capital of the state of São Paulo, the most populous and wealthiest Brazilian state, located in the country's Southeast Region. Listed by the GaWC a ...
.) Finally, Yeongjong Island, a part of the city of
Incheon Incheon (; ; or Inch'ŏn; literally "kind river"), formerly Jemulpo or Chemulp'o (제물포) until the period after 1910, officially the Incheon Metropolitan City (인천광역시, 仁川廣域市), is a city located in northwestern South Kore ...
, slightly west of Seoul, was chosen for the new airport, which later came to be known as
Incheon International Airport Incheon International Airport (IIA; ) (sometimes referred to as Seoul–Incheon International Airport) is the largest airport in South Korea. It is the primary airport serving the Seoul Capital Area and one of the largest and busiest airports ...
. All international flights were moved to Incheon when it opened in 2001.


Post-Incheon-activation era

"Shuttle" flights to Haneda Airport in Tokyo started in November 2003 on a charter basis, cutting 30 minutes or more of ground transportation at each end in an attempt to attract business travelers. This "city to city" route was followed by new routes to
Hongqiao Airport Shanghai Hongqiao International Airport is one of the two international airports of Shanghai and a significant airline hub of China. Hongqiao Airport mainly serves domestic and regional flights, although the airport also serves international fl ...
in
Shanghai Shanghai (; , , Standard Mandarin pronunciation: ) is one of the four direct-administered municipalities of the People's Republic of China (PRC). The city is located on the southern estuary of the Yangtze River, with the Huangpu River flow ...
starting in October 2007, Kansai Airport in
Osaka is a designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the third most populous city in Japan, following Special wards of Tokyo and Yokohama. With a population of 2. ...
starting in 2008,
Beijing } Beijing ( ; ; ), alternatively romanized as Peking ( ), is the capital of the People's Republic of China. It is the center of power and development of the country. Beijing is the world's most populous national capital city, with over 21 ...
starting in July 2011, and Songshan Airport in
Taipei Taipei (), officially Taipei City, is the capital and a special municipality of the Republic of China (Taiwan). Located in Northern Taiwan, Taipei City is an enclave of the municipality of New Taipei City that sits about southwest of the n ...
starting in April 2012. Total international passenger numbers at Gimpo rose from under one million in 2005 to over four million by 2012. Korea Airports announced an expansion and remodeling of the terminals in 2013, adding new gates and security checkpoints. In 2017, the
South Korean government The Government of South Korea is the union government of the South Korea, Republic of Korea, created by the Constitution of South Korea as the executive, legislative and judicial authority of the republic. The president acts as the head of sta ...
announced that a new terminal would be built to meet growing domestic traffic. Gimpo currently has two runways (3600 × 45 m and 3200 × 60 m), two passenger terminals, and one cargo terminal.


Airlines and destinations


Statistics


Top carriers

In 2016, the ten carriers with the largest percentage of passengers flying into, out of, or through Gimpo International Airport are as follows:


Traffic by calendar year


Other facilities

Korea Airports Corporation Korea Airports Corporation was established in 1980 in Seoul, South Korea to carry out construction, checks and balances, management and operation of airports and to manage air transportation efficiently. As an organization specializing in airport ...
(KAC) has its headquarters on the airport property. The
Aviation and Railway Accident Investigation Board The Aviation and Railway Accident Investigation Board (ARAIB, ko, 항공ㆍ철도사고조사위원회) is an agency of the South Korean government that investigates aviation and railway accidents, subservient to the Ministry of Land, Infrastruc ...
(ARAIB) has its FDR/CVR Analysis and Wreckage Laboratory on the property of the airport. When the predecessor agency Korea Aviation Accident Investigation Board (KAIB) existed, its CVR/FDR and wreckage laboratory was located on the airport property.


Ground transportation


Railway

On 23 March 2007 the AREX airport express line started operations to
Incheon International Airport Incheon International Airport (IIA; ) (sometimes referred to as Seoul–Incheon International Airport) is the largest airport in South Korea. It is the primary airport serving the Seoul Capital Area and one of the largest and busiest airports ...
, with an extension to
Seoul Station Seoul Station is a major railway station in Seoul, the capital of South Korea. The station is served by the Korail Intercity Lines and the commuter trains of the Seoul Metropolitan Subway. Services KTX Seoul Station is the terminus of most ...
which opened in December 2010.
Seoul Subway Line 9 Seoul Subway Line 9, operated by Seoul Metro Line9 Corporation, is a subway line in Seoul. The line runs east from Gaehwa Station (local train terminal) or Gimpo Airport Station (express train terminal, connecting to Line 5 and Airport Railroad ...
also links the airport to the Gangnam area. For many years, the airport was served by the
Gimpo Line The Gimpo Line is a former freight railway line operated by Korean National Railroad that served Gimpo International Airport, southwest of Seoul. The line was a 9.2 km spur line that terminated near the airport and connected to the Gyeongin ...
, a railway line that no longer exists. In the 1990s, Seoul Subway Line 5 was extended to Gimpo Airport.


Roadway

Gimpo International Airport is connected to Incheon International Airport by
Incheon International Airport Expressway The Incheon International Airport Expressway (Korean: 인천국제공항고속도로, Incheon Gukje Gonghang Gosok Doro) is an expressway in South Korea connecting Incheon International Airport to Goyang, Gyeonggi. History * December 1995: Con ...
via Gimpo Airport Interchange. Some others road also linked Gimpo Airport with
Seoul Seoul (; ; ), officially known as the Seoul Special City, is the capital and largest metropolis of South Korea.Before 1972, Seoul was the ''de jure'' capital of the Democratic People's Republic of Korea (North Korea) as stated iArticle 103 ...
and nearby province including National Route 39, National Route 48,
Olympic-daero The Olympic-daero (also called Olympic Blvd ko, 올림픽대로; ''Olrimpik Daero'') is 8-lane highway located in Seoul. South Korea. This route connects Seoul to Gimpo, Hanam and Gimpo International Airport, with a total length of This ...
and
Seoul City Route 92 Seoul Metropolitan City Route 92 () is an urban road located in Gyeonggi Province and Seoul, South Korea. With a total length of , this road starts from the Haengju Bridge in Gangseo District, Seoul to Amsa Water Purification Facilities in Gangdon ...
(
Nambu Beltway Nambu Beltway () is a 6-10 lanes urban road located in Gyeonggi Province and Seoul, South Korea. With a total length of , this road starts from the Gimpo International Airport Entrance Intersection in Gangseo District, Seoul to Suseo Interchange ...
).


Accidents and incidents

* On 19 November 1980, Korean Air Lines Flight 015, a Boeing 747-200 landed short of the runway, ripping off all main landing gear, causing the aircraft to skid to a stop on the nose wheel and outer 2 engines starting a fire. 15 of the 226 total occupants were killed, including the First Officer and Captain. * On 14 September 1986, A bomb blast occurred outside a terminal building, killing five people and wounding 36. The attack was blamed on
North Korea North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and shares borders with China and Russia to the north, at the Yalu River, Y ...
as an attempt to disrupt the
1986 Asian Games The 1986 Asian Games ( ko, 1986년 아시아 경기대회/1986년 아시안 게임, Cheon gubaek palsip-yuk nyeon Asia gyeonggi daehoe/Cheon gubaek palsip-yuk nyeon Asian Geim), officially known as the 10th Asian Games and the X Asiad ( ko, 제10 ...
starting 6 days later. * On 25 November 1989, Korean Air Flight 175, a
Fokker F28-4000 The Fokker F28 Fellowship is a twin-engined, short-range jet airliner designed and built by Dutch aircraft manufacturer Fokker. Following the Fokker F27 Friendship, an early and commercially successful turboprop-powered regional airliner, Fokke ...
en route to Gangneung Airport stalled and crashed right after takeoff, killing one person and wounding 40 people. * On 5 August 1998,
Korean Air Flight 8702 Korean Air Flight 8702, operated by a Boeing 747-400, departed Tokyo, Narita International Airport on 5 August 1998 at 16:50 for a flight to Seoul, scheduled to arrive there at 19:20. Bad weather, including heavy rainfall, at Seoul forced the f ...
, a
Boeing 747-400 The Boeing 747-400 is a large, long-range wide-body airliner produced by Boeing Commercial Airplanes, an advanced variant of the initial Boeing 747. The "Advanced Series 300" was announced at the September 1984 Farnborough Airshow, targeting ...
rolled off the runway upon touchdown and slid into a ditch, resulting in the destruction of the aircraft's undercarriage and the fuselage being split. All 395 of the total occupants survived and the aircraft was written off.


See also

*
List of the busiest airports in South Korea This is a list of the busiest airports in South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korean Peninsula and sharing a land border with North Korea. Its w ...
* Transport in South Korea


References

* *


External links


Gimpo Airport
{{authority control Airports established in 1939 1939 establishments in Korea Airports in South Korea Transport in Seoul Buildings and structures in Gangseo District, Seoul Korean War air bases Installations of the United States Air Force in South Korea