Wyverns get down, dirty
U.S. Air Force 1st Lt. Cole Johnson, 31st Logistics Readiness Squadron petroleum, oils and lubricants flight commander, climbs the monkey bars during the Wyvern Mud Run, Oct. 17, 2015, at Aviano Air Base, Italy. The six mile course included 400,000 pounds of mud with more than 12 obstacles, such as T-walls, low crawls and tire flips. (U.S. Air Force photo by Senior Airman Areca T. Bell/Released)