U.S. Air Force Staff Sgt. Mathew Footit, 633rd Aerospace Medicine Squadron bioenvironmental engineer craftsman, tests the circulation and quality of the air in a portable paint booth at Joint Base Langley-Eustis, Va., March 2, 2018. The 1st Maintenance Squadron Low Observable Flight worked with the 633rd Civil Engineer Squadron and 633rd Aerospace Medicine Squadron to build the portable spray booth to improve productivity. (U.S. Air Force photo by Senior Airman Tristan Biese)