C-21s on ramp in Alaska
Two C-21 Learjet airlift aircraft from the 200th Airlift Squadron, Colorado Air National Guard, based in Peterson Air Force Base, Colo., sit on the ramp during an air defense training exercise in Anchorage, Alaska. During the exercise, the C-21s acted as a hostile threat to homeland security, necessitating a response from the local Aerospace Control Alert unit, the 3rd Fighter Wing, Joint Base Elmendorf-Richardson, Anchorage, Alaska, Aug. 30, 2017. The experienced C-21 pilots from the 200th AS provide unmatched training for alert pilots, not only in Alaska but for their fellow alert unit at Buckley AFB, Colo., the 120th Fighter Squadron, and other fighter alert sites throughout the nation. (U.S. Air National Guard photo by Lt. Col. Derek Tate)

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Photo by: Lt Col Derek Tate |  VIRIN: 170830-Z-ZZ999-553.JPG