Senior Airman Aarron Hey, 90th Maintenance Operations Squadron Power, Refrigeration and Electrical, conducts a pre-maintenance check of a missile launch facility work cage on F.E. Warren Air Force Base, Sept. 11, 2014. Hey is a member of the 90th MOS PREL team competing in the Air Force Global Strike Challenge. (U.S. Air Force photo by Lan Kim)
Lan Kim
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