U.S. Air Force 1st Lt. Alvin Yip, 20th Civil Engineer Squadron deputy officer in charge of requirements and optimization, measures a piece of wood in front of Memorial Lake at Shaw Air Force Base, S.C., Feb. 5, 2018. Volunteers cleaned the park and rebuilt the bridge and gazebo at the lake, and are working to rebuild the overflow bridge. (U.S. Air Force photo by Senior Airman Destinee Sweeney)