U.S. Marine Corps Lance Cpl. Alec Tweedy, Marine Wing

U.S. Marine Corps Lance Cpl. Alec Tweedy, Marine Wing Support Squadron 172 combat engineer, uses a stanchion and rod to measure the ground’s evenness for a joint airfield damage repair exercise May 19, 2016 at Kadena Air Base, Japan. Marines from the Marine Wing Support Squadron 172 trained with Airmen from the 18th Civil Engineer Squadron to enhance readiness in a crisis event that would require them to work together. (U.S. Air Force photo by Senior Airman Omari Bernard)