Renovating mission capability
U.S. Air Force Airman 1st Class Daniel Davis and Michael Gutenberger, 18th Civil Engineer Squadron structural apprentices, prepare mortar for brick-laying Dec. 7, 2016, at Kadena Air Base, Japan. Back-up generators are a necessity for every building. Constructing brick walls protects them from the elements. (U.S. Air Force photo by Senior Airman Lynette M. Rolen/Released)