PMEL
Senior Airman Matthew Furlough, 51st Maintenance Squadron physical dimensional precision measurement equipment laboratory technician, makes an adjustment on an engine warning test set on Osan Air Base, Republic of Korea, June 6, 2014. The unit repairs equipment ranging from torque wrenches, spectrum analyzers, communication analyzers, avionics equipment, scales and gun gauges. (U.S. Air Force photo/Senior Airman David Owsianka)