(L-R) Senior Master Sgt. Tim Smith and Master Sgt. Brian Osman, air advisors assigned to the 770th Air Expeditionary Advisory Squadron, and Iraqi Air Force 1st Lt. Alaa Aziz, oxygen officer, watch an Iraqi maintenance airman fill up a tank with liquid oxygen May 22, 2018, at Al Muthana Air Base in Baghdad, Iraq.

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Keywords: afcent, air, america, archive, armed, army, cjtf-oir, defence, force, forces, military, navy, reportage, service, serviceman, servicemen, soldier, states, united, usa