A clean delivery Published Dec. 3, 2002 OPERATION ENDURING FREEDOM (AFPN) -- Senior Airman Nathan Setser, a fuels operator at a forward-deployed location, checks the purity and odor of a liquid oxygen sample to ensure it is operational. Setser is assigned to the 321st Expeditionary Logistics Readiness Squadron's fuels management flight. The flight's mission is to provide clean, dry fuel and cryogenics for coalition aircraft. (Photo by Tech. Sgt Deb Alvarado)