Chemical Warfare Training
Airman 1st Class Jarid Sims, 49th Civil Engineer Squadron, instructs a student on how to properly tighten gas mask straps during chemical warfare training in the 49th Security Forces Squadron at Holloman Air Force Base, N.M., July 29. Mission Oriented Protective Posture (MOPP) requires personnel to wear protective clothing and equipment approriate to the threat level in the area. (U.S Air Force photo/ Airman 1st Class DeAndre Curtiss)