U.S. Air Force Tech. Sgt. Jesse Liethen, Survival, Evasion, Resistance, and Escape specialist with the 908th Operations Support Squadron, explains and demonstrates the Helicopter Emergency Egress Device System bottle during a SERE water training event at the East Branch YMCA, Montgomery, Alabama, Feb. 27, 2025. The HEEDS bottle is a compact, self-contained breathing system designed to provide critical air supply during emergencies, such as escaping a submerged helicopter. Augmentees in attendance learned how to deploy, clear, and breathe from the HEEDS bottle, while focusing on proper breathing techniques to maximize available air. (U.S. Air Force photo by Senior Airman Erica Webster)