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Interior Communications Electrician 1st Class Theodora Kales, battle effects technician with Naval Expeditionary Medicine Warfighter Development Center (NEMWDC), adjusts the oxygen pressure settings on a battle effects system used to simulate .50 caliber gunfire and explosions during an Expeditionary Resuscitative Surgical System course at NEMWDC, Apr. 14. The realistic soundscape enhances stress exposure and immersion for medical teams operating in combat-simulated environments. (U.S. Navy photo by Petty Officer 2nd Class Moira Francine Esquivel)
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