497th Fighter-Interceptor Squadron
497th may refer to: *497th Air Refueling Wing, inactive United States Air Force unit * 497th Bombardment Group, inactive United States Air Force unit * 497th Bombardment Squadron, inactive United States Air Force unit * 497th Combat Training Squadron, United States Air Force unit * 497th Intelligence, Surveillance and Reconnaissance Group (497 ISRG) is an intelligence unit at Joint Base Langley–Eustis, Virginia See also * 497 (number) * 497, the year 497 (CDXCVII) of the Julian calendar *497 BC __NOTOC__ Year 497 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Atratinus and Augurinus (or, less frequently, year 257 ''Ab urbe condita''). The denomination 497 BC for this year has ...

497th Air Refueling Wing
497th may refer to: * 497th Air Refueling Wing, inactive United States Air Force unit * 497th Bombardment Group, inactive United States Air Force unit * 497th Bombardment Squadron, inactive United States Air Force unit * 497th Combat Training Squadron, United States Air Force unit * 497th Intelligence, Surveillance and Reconnaissance Group (497 ISRG) is an intelligence unit at Joint Base Langley–Eustis, Virginia See also * 497 (number) * 497, the year 497 (CDXCVII) of the Julian calendar *497 BC __NOTOC__ Year 497 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Atratinus and Augurinus (or, less frequently, year 257 ''Ab urbe condita''). The denomination 497 BC for this year has ...

497th Bombardment Group
The 497th Bombardment Group was a group of the United States Army Air Forces. The unit was inactivated on 31 March 1946. The unit was part of the United States Army Air Forces and Twentieth Air Force during World War II. The 497th BG engaged in very heavy (B-29 Superfortress) bombardment operations against Japan. Its aircraft were identified by a "A" and a square painted on the tail. Its history and lineage are carried on by the present 497th Air Expeditionary Group. History World War II The unit was established in late 1943 at El Paso Municipal Airport, Texas, being formed as a B-29 Superfortress Very Heavy bombardment Group. The unit was formed with four bomb squadrons (869th, 870th, 871st and 872d), all being newly constituted. It moved to Pratt Army Air Field, Kansas in December 1943 to begin training. Due to a shortage of B-29s, the group was equipped with former II Bomber Command B-17 Flying Fortresses already at Pratt which were previously used for training heavy b ...
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497th Bombardment Squadron
The 497th Bombardment Squadron is an inactive United States Air Force unit. Its last was assigned to the 344th Bombardment Group, stationed at Schleissheim Palace, Germany. It was inactivated on 15 February 1946. History Activated in late 1942 as a III Bomber Command Replacement Training Unit. In late 1943, realigned as an operational squadron, deployed to European Theater of Operations in February 1944. Assigned to IX Bomber Command in 1944. Engaged in tactical bombardment of enemy targets in Occupied Europe initially from stations in England, then after D-Day, moved to Advanced Landing Grounds in France and Belgium; advancing eastward as Allied ground forces advanced. Supported Eighth Air Force strategic bombardment missions over Nazi Germany and Occupied Europe; striking enemy airfields to obtain maximum interference in Luftwaffe day interceptor attacks on heavy bomber formations returning to England. Also participated in Western Allied Invasion of Germany, March–A ...
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497th Combat Training Squadron
The 497th Combat Training Flight is a United States Air Force unit. Its present station is Singapore's Paya Lebar Air Base, where its mission is to provide operational and logistical support to U.S. Air Force fighter aircraft deployed to Singapore for training exercises with the Republic of Singapore Air Force. History World War II Operational training unit, June 1942 – October 1943; replacement training, October 1943 – April 1944. Cold War Air defense of West coast, 1953–1955. Air Defense of Southwest Europe, 1958–1964. In the early 1960s Headquarters, United States Air Force (USAF) implemented Project Clearwater. Clearwater was designed to return overseas Convair F-102 Delta Dagger squadrons stationed overseas to the United States to reduce "gold flow" (adverse balance of payments). This resulted in the 497th being reduced to a paper unit and its planes dispersed to Air Defense Command interceptor squadrons in the US. Although it had originally been intended to i ...
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497th Intelligence, Surveillance And Reconnaissance Group
The United States Air Force's 497th Intelligence, Surveillance and Reconnaissance Group is an intelligence unit located at Joint Base Langley–Eustis, Virginia. Mission The 497th Group delivers real-time high-confidence intelligence, surveillance and reconnaissance products and services to Joint and Coalition forces and other designated government agencies. The Group consists of four active duty Squadrons, the 497th Operations Support Squadron, the 45th Intelligence Squadron, the 30th Intelligence Squadron and 10th Intelligence Squadron, one Air National Guard unit, the 192nd Intelligence Squadron (VA ANG), and a new classic Air Reserve unit, the 718th Intelligence Squadron, stood up to support the total force integration of the Wing and combat ISR operations. History Background In 1951, United States Air Forces Europe (USAFE) recognized its need for a reconnaissance technical squadron in the European theater to process and produce aerial reconnaissance materials, interpret p ...
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497 (number)
400 (four hundred) is the natural number following 399 and preceding 401. Mathematical properties 400 is the square of 20. 400 is the sum of the powers of 7 from 0 to 3, thus making it a repdigit in base 7 (1111). A circle is divided into 400 grads, which is equal to 360 degrees and 2π radians. (Degrees and radians are the SI accepted units). 400 is a self number in base 10, since there is no integer that added to the sum of its own digits results in 400. On the other hand, 400 is divisible by the sum of its own base 10 digits, making it a Harshad number. Other fields Four hundred is also * The Four Hundred (oligarchy) of ancient Athens. * An HTTP status code for a bad client request. * The Four Hundred (sometimes The Four Hundred Club) a phrase meaning the wealthiest, most famous, or most powerful social group (see, e.g., Ward McAllister), leading to the generation of such lists as the Forbes 400. * The Atari 400 home computer. * A former limited stop bus route whi ...
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