Active duty and Hawaii Air National Guard crew chiefs observe flightline operations after prepping an F-22 Raptor for flight Dec. 10, 2018, at Joint Base Pearl Harbor-Hickam during exercise Sentry Aloha. The routine exercise is held several times each year to provide aircraft with dissimilar combat training amongst participating flying units. This rendition includes the 199th and 19th Fighter Squadrons’ Hickam based Raptors, Oregon Air National Guard F-15 Eagles and U.S. Navy F/A-18 Hornets from China Lake, California. (U.S. Air National Guard photo by Senior Airman John Linzmeier)

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Photo by: Senior Airman John Linzmeier |  VIRIN: 181212-Z-GR156-0140.JPG