Senior Airman Roccco Patel, 379th Expeditionary Maintenance Squadron precision measurement equipment laboratory technician, calibrates a Jet Cal Analyzer used to diagnose and check systems on aircraft Aug. 24, 2016 at Al Udeid Air Base, Qatar. The PMEL shop calibrates equipment for all branches in the area of responsibility. (U.S. Air Force photo/Tech. Sgt. CarlosJ. Treviño/Released)