Staff Sgt. Kevin Searls, 379th Expeditionary Logistics Readiness Squadron fuels cryogenics supervisor, tightens the fittings of a vent hose in preparation of an aircraft shipment Aug. 5, 2016, at Al Udeid Air Base, Qatar. Depending on the mission, the cryogenics team ships an average of six liquid oxygen and liquid nitrogen a week to bases within the U.S. Air Forces Central Command’s area of responsibility. (U.S. Air Force photo/Senior Airman Janelle Patiño/Released)