Alaska Air National Guardsmen, assigned to the 176th Maintenance Squadron, perform an isochronal inspection of a HC-130 Hercules at Joint Base Elmendorf-Richardson, Alaska, Nov. 16, 2016. Isochronal inspections are performed to ensure that aircraft are safe and remain mission ready. (U.S. Air Force photo/Alejandro Pena)
<br>Unit: Joint Base Elmendorf-Richardson Public Affairs
Alejandro Pena
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