Senior Airman Christopher Martinez, 8th Expeditionary Air Mobility Squadron crew chief, purges a tank of liquid oxygen as he recharges a C-17 Globemaster III Sept. 3, 2016, at Al Udeid Air Base, Qatar. Martinez joined the Air Force in November 2013 to follow his father’s footsteps as a crew chief and later on cross-trained to the electrical field. (U.S. Air Force photo/Senior Airman Janelle Patiño/Released)
<br>Unit: 379th Air Expeditionary Wing
Senior Airman Janelle Patiño
Taken on 2 September 2016
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