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U.S. Air Force Senior Airman Nicholas Cardona, left, and U.S. Coast Guard Sector St Petersburg Marine Science Technician 3 Jayson Simmons, Airman Leadership School Class 25-F students, complete a ruck march at MacDill Air Force Base, Florida, Oct. Aug, 2025. Physical fitness is one of four pillars in the Comprehensive Airmen Fitness Program. ALS requires students to complete a mock physical fitness exam and semi-weekly group fitness sessions to build more lethal, ready supervisors. (U.S. Air Force photo by Senior Airman Zachary Foster)