11th Civil Engineer Squadron structural apprentices Airman 1st Class Mathew Crozier, left, and Airman 1st Class Owen Tkatch weld a metal grate in the structures shop on Joint Base Andrews Md., Feb. 13, 2019. Structural apprentices help maintain the base and its facilities, the grate will be used in a hangar for water drainage. (U.S. Air Force photo by Airman 1st Class Noah Sudolcan)