Spc. Ashleigh Cardwell from the Fort Polk Veterinary Treatment Facility shows Spc. Cruz Espinoza, 5th Battalion, 25th Field Artillery Regiment, 3rd Brigade Combat Team the intercostal spacing between the ribs on a K9 training aid. This allows for the decompress air when there is a possible tension pneumothorax (collapsed lung) during the Emergency Medical Technician training conducted by the Bayne-Jones Army Community Hospital Education Division at Fort Polk, La. on Feb. 26.

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