An F-22 Raptor with the 199th FS, Hawaii Air National Guard, taxis out for a morning flight during the Sentry Aloha fighter exercise at Joint Base Pearl Harbor-Hickam, Hawaii, March 18, 2015. Sentry Aloha is a large force exercise hosted by the Hawaii Air National Guard. Over 1,000 service members and 45 aircraft from seven states are participating in this iteration of the exercise. (U.S. Air National Guard photo by Senior Airman Orlando Corpuz)