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Tech. Sgt. John Gibson, center, a CV-22 Osprey tail scanner assigned to the 20th Special Operations Squadron, conduct a pre-flight inspection before a sortie during Exercise Emerald Warrior 18 at Cannon Air
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Flight Radio - US Aircraft Frequency Guide - 2017-2018 Edition: Guide to listening to Aircraft Communication on your Scanner Radio, Dell, Michael, eBook - Amazon.com
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