![U.S. Air Force Senior Master Sgt. Jon Pieters, right, an emergency manager with the 133rd Civil Engineer Squadron, teaches a class on post attack reconnaissance sweeps in St. Paul, Minn., Feb. 24, U.S. Air Force Senior Master Sgt. Jon Pieters, right, an emergency manager with the 133rd Civil Engineer Squadron, teaches a class on post attack reconnaissance sweeps in St. Paul, Minn., Feb. 24,](https://c8.alamy.com/comp/MCE2H0/us-air-force-senior-master-sgt-jon-pieters-right-an-emergency-manager-with-the-133rd-civil-engineer-squadron-teaches-a-class-on-post-attack-reconnaissance-sweeps-in-st-paul-minn-feb-24-2018-airmen-with-the-133rd-airlift-wing-are-participating-in-the-annual-expeditionary-skills-rodeo-which-familiarize-them-with-self-aid-buddy-care-wearing-the-mission-oriented-protective-posture-or-mopp-gear-and-detecting-unexploded-ordinance-us-air-national-guard-photo-by-tech-sgt-austen-r-adriaens-MCE2H0.jpg)
U.S. Air Force Senior Master Sgt. Jon Pieters, right, an emergency manager with the 133rd Civil Engineer Squadron, teaches a class on post attack reconnaissance sweeps in St. Paul, Minn., Feb. 24,
Hill Air Force Base on Twitter: "Always Ready!! Chief Master Sgt. Christopher Walker, command chief master sergeant for the 75th Air Base Wing, recently visited Airmen from the 75th Operations Support Squadron
Wearing their Mission-Oriented Protective Posture response level 4 (MOPP-4) gear, CHIEF MASTER Sergeant (CMSGT)
![Working in Mission-Oriented Protective Posture response level 2 (MOPP-2) gear, and armed with a 5.56 mm M16A2 rifle, AIRMAN (AMN) Robert Wolfe, USAF, 51st Security Forces Squadron (SFS), lays prone along the Working in Mission-Oriented Protective Posture response level 2 (MOPP-2) gear, and armed with a 5.56 mm M16A2 rifle, AIRMAN (AMN) Robert Wolfe, USAF, 51st Security Forces Squadron (SFS), lays prone along the](https://cdn10.picryl.com/photo/2002/01/30/working-in-mission-oriented-protective-posture-response-level-2-mopp-2-gear-9d9066-1024.jpg)
Working in Mission-Oriented Protective Posture response level 2 (MOPP-2) gear, and armed with a 5.56 mm M16A2 rifle, AIRMAN (AMN) Robert Wolfe, USAF, 51st Security Forces Squadron (SFS), lays prone along the
![Portrait of CHIEF MASTER Sergeant (CMSGT) Paul Helphenstine, USAF, 36th Fighter Squadron (FS), with his MCU-2P gas mask in Mission-Oriented Protective Posture response level 4 (MOPP-4) gear, as he takes cover in Portrait of CHIEF MASTER Sergeant (CMSGT) Paul Helphenstine, USAF, 36th Fighter Squadron (FS), with his MCU-2P gas mask in Mission-Oriented Protective Posture response level 4 (MOPP-4) gear, as he takes cover in](https://cdn10.picryl.com/photo/2002/01/30/portrait-of-chief-master-sergeant-cmsgt-paul-helphenstine-usaf-36th-fighter-b3f372-1024.jpg)
Portrait of CHIEF MASTER Sergeant (CMSGT) Paul Helphenstine, USAF, 36th Fighter Squadron (FS), with his MCU-2P gas mask in Mission-Oriented Protective Posture response level 4 (MOPP-4) gear, as he takes cover in
![Investigator Michael Lawrence, 436th Security Forces Squadron NCO in charge of investigations and intelligence, and Master Sgt. Anthony Kinnick, 436th SFS chief of standards and evaluations, practice gas mask hydration during a Investigator Michael Lawrence, 436th Security Forces Squadron NCO in charge of investigations and intelligence, and Master Sgt. Anthony Kinnick, 436th SFS chief of standards and evaluations, practice gas mask hydration during a](https://c8.alamy.com/comp/M3XDYB/investigator-michael-lawrence-436th-security-forces-squadron-nco-in-M3XDYB.jpg)
Investigator Michael Lawrence, 436th Security Forces Squadron NCO in charge of investigations and intelligence, and Master Sgt. Anthony Kinnick, 436th SFS chief of standards and evaluations, practice gas mask hydration during a
With both dressed in Mission-Oriented Protective Posture response level 4 ( MOPP-4) chemical gear, MASTER
![Wearing Mission-Oriented Protective Posture response level 2 (MOPP-2) gear, AIRMAN First Class (A1C) James Boyd, USAF, 51st Security Forces Squadron (SFS), checks personnel identifications at an Entry Control Point (ECP) during Exercise Wearing Mission-Oriented Protective Posture response level 2 (MOPP-2) gear, AIRMAN First Class (A1C) James Boyd, USAF, 51st Security Forces Squadron (SFS), checks personnel identifications at an Entry Control Point (ECP) during Exercise](https://cdn10.picryl.com/photo/2002/01/30/wearing-mission-oriented-protective-posture-response-level-2-mopp-2-gear-airman-612251-1024.jpg)