2/22/2011 - A 96th Aerospace Medical Squadron Airman connects the Portacount machine to an Airman’s gas mask to begin the gas mask fit test to ensure readiness prior to Eglin’s phase two exercise occurring Feb. 22-25. The test is to ensure personnel are fitted to the proper size mask and to build confidence in its performance and use, according to 2nd Lt. Lindsay M. Kotouch, 96th Aerospace Medical Squadron. The exercises used alter the seal as facial movements occur and ensure the mask to face seal is not broken and won't allow contamination into the mask. (U.S. Air Force photo/Samuel King Jr.)

2/22/2011 - Staff Sgt. Terence Walker, 96th Force Support Squadron, adjusts the straps on his mask prior to starting the gas mask fit test while a 96th Aerospace Medical Squadron Airman explains mask procedures to the next Airman to undergo the test. The testing took place Feb. 18 prior to Eglin’s phase two exercise Feb. 22-25. The test is to ensure personnel are fitted to the proper size mask and to build confidence in its performance and use, according to 2nd Lt. Lindsay M. Kotouch, 96th Aerospace Medical Squadron. The exercises used alter the seal as facial movements occur and ensure the mask to face seal is not broken and won't allow contamination into the mask. (U.S. Air Force photo/Samuel King Jr.)

2/22/2011 - Two Airmen undergo the gas mask fit test prior to Eglin’s phase two exercise occurring Feb. 22-25. The test is to ensure personnel are fitted to the proper size mask and to build confidence in its performance and use, according to 2nd Lt. Lindsay M. Kotouch, 96th Aerospace Medical Squadron. The exercises used alter the seal as facial movements occur and ensure the mask to face seal is not broken and won't allow contamination into the mask. (U.S. Air Force photo/Samuel King Jr.)

2/22/2011 - Airman 1st Class Pedro Llanos-Caraballo, 96th Logistics Readiness Squadron, undergoes a gas mask fit test prior to Eglin’s phase two exercise occurring Feb. 22-25. The test is to ensure personnel are fitted to the proper size mask and to build confidence in its performance and use, according to 2nd Lt. Lindsay M. Kotouch, 96th Aerospace Medical Squadron. The exercises used alter the seal as facial movements occur and ensure the mask to face seal is not broken and won't allow contamination into the mask. (U.S. Air Force photo/Samuel King Jr.)