(From left) U.S. Air Force Staff Sgt. Taj Copeland,

(From left) U.S. Air Force Staff Sgt. Taj Copeland, 455th Expeditionary Logistics Readiness squadron, and Staff Sgt. James Brumbaugh, 455 ELRS fuels cryogenics noncommissioned officer in charge, refill liquid oxygen carts or LOX for aircraft at Bagram Air Field, Afghanistan Sept. 4, 2014. The cryogenics flight is responsible for providing more than 4,000 gallons of liquid oxygen per month to aircraft. Brumbaugh is deployed from Davis-Monthan Air Force Base, Ariz. and a native of Clarkrange, Tenn. Copeland is deployed from Nellis Air Force Base, Nev. and a native of Tampa, Fla. (U.S. Air Force photo by Staff Sgt. Evelyn Chavez/Released)