Air Force Col. John York, standing left, commander, 154th Operations Group, addresses airmen participating in Sentry Aloha 18-01 during the welcome and safety briefings at Joint Base Pearl Harbor-Hickam, Hawaii Jan. 9, 2018. Sentry Aloha provides the Air National Guard, Air Force and DoD counterparts a multi-faceted, joint venue with supporting infrastructure and personnel that incorporates current, realistic integrated training. Air National Guard photo by Senior Master Sgt. Chris Drudge