U.S. Air Force Senior Airman Samuel Baker, operations team member assigned to the 316th Civil Engineer Squadron, maintains security while 1st Lt. Maria Reffner, flight commander, prepares to remove Senior Airman Steven Fazakerley’s mask during final decontamination procedures in a Chemical, Biological, Radiological, and Nuclear training exercise at Joint Base Andrews, Md., Aug. 23, 2024. The decontamination process, including mask removal, is a critical step to ensure personnel safety after exposure to simulated contaminants. (U.S. Air Force photo by Staff Sgt. Isaac March)