Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The 21st Operations Group (21 OG) is an operational component of the 21st Space Wing, stationed at Peterson Air Force Base, Colorado. The mission of the 21st OG is to provide overall management and guidance to 21 geographically separated units assigned to the wing, which provide attack warning and space control. Its history goes back to World War II when the 21st Fighter Group flew very long range (VLR) escort missions of Twentieth Air Force B- 29 Superfortress bombardment groups against Japan. During the Cold War, the unit was a USAFE tactical fighter unit assigned to France in the 1950s and later controlled all operational fighter squadrons at Elmendorf AFB, Alaska.

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