U.S. Air Force Staff Sgt. Aaron Perdue, 633rd Civil Engineer Squadron non-commissioned officer in charge, checks cables during a real-world event that was part of a Phase Two exercise at Joint Base Langley-Eustis, Virginia, Nov. 19, 2020. The Phase Two exercise involved units to include the 633rd CES, operations, the fire department, engineering, Explosive Ordnance Disposal and Emergency Management. (U.S. Air Force photo by Senior Airman Alexandra Singer)