A draining task
YOKOTA AIR BASE, Japan -- The coils of a heat exchanger freeze while Airman 1st Class Andrea Jones (left) and Senior Airman Garry King drain a liquid oxygen cart to test the heat exchanger for serviceability. Technicians with the 374th Maintenance Squadron here inspect, calibrate, repair and maintain cryogenic/compressed gas units. (U.S. Air Force photo by Master Sgt. Val Gempis)