U.S. Air Force Staff Sgt. Homero Valdez, 18th Medical Support Squadron NCO-in-charge of acquisitions, swings from an obstacle during the Alpha Warrior Fitness Challenge July 28, 2018, at Kadena Air Base, Japan. he 18th Force Support Squadron hosted the challenge as part of the Air Force’s improved fitness initiative. (U.S. Air Force photo by Senior Airman Kristan Campbell)