LANGLEY AIR FORCE BASE, Va. -- Senior Airman Derek Chandler, 192nd Equipment Maintenance Squadron low observable technician, looks to the ceiling March 14 during a gas mask fit test administered by volunteers Staff Sgt. Jennifer Flecker, 1st AMDS aerospace physiology logistics noncommissioned officer in charge , and Senior Airman Christian Ledward, 1st Aerospace Medicine Squadron aerospace physiology journeyman. Looking up and down and side to side are only a few tasks an Airman must perform to successfully pass the fit test in preparation for the upcoming operational readiness exercise March 17 through 22. These tests ensure masks fit properly and no hazardous chemicals can reach an Airman’s respiratory system. (U.S. Air Force photo/Airman 1st Class Chase Skylar DeMayo)