Worthington Challenge
Sergeant Rayn Duginski and Staff Sergeant Wealey Goff of the 278th Armored Cavalry Regiment in Knoxville, Tenn., run towards the finishline during the land navigation and observation section of the Worthington Challenge.The Worthington Challenge is an internatoinal armored crew competition, hosted by the Canadian Army, focused on showing armed crew skills as well as sharing best training practices amongst allies.(US Air Force photo by Senior Airman Leon Bussey / Released)