Two crew chiefs with the 154th Maintenance Group, Hawaii Air National Guard prepare to launch a F-22 Raptor at Joint Base Pearl Harbor-Hickam on Jan. 16, 2018 as part of Sentry Aloha exercises. Sentry Aloha is an ongoing series of exercises, hosted by the Hawaii Air National Guard's 154th Wing, involving multiple types of aircraft and services. (U.S. Air National Guard photo by Staff Sgt. James Ro)