U.S. Air Force Airman Jesse Foley and Airman 1st Class Isiah Smothers, 31st Maintenance Squadron Electrical and Environmental journeymen, release pressure from a liquid oxygen tank, Jan. 20, 2016, at Aviano Air Base, Italy. The E&E section collaborates with the 31st Logistics Readiness Squadron Petroleum, Oils and Lubricants section to ensure each tank is ready for use on the flightline. (U.S. Air Force photo by Airman 1st Class Cary Smith/Released)