Airman 1st Class Scott Willard, 96th Air Refueling Squadron boom operator, guides a boom to connect to an aircraft during an in-air refueling aboard a KC-135 Stratotanker near Joint Base Pearl Harbor-Hickam, Hawaii, March 14, 2014. Willard and his crew participated in a Warrior Day training exercise as part of Sentry Aloha, an air-to-air exercise that allowed participants to practice offensive and defensive wartime tactics. (U.S. Air Force photo/Staff Sgt. Alexander Martinez)