Stress Test Soldiers fire M4A1 carbine rifles during a stress shoot as part of the U.S. Army Transformation and Training Command Best Squad Competition at Fort Polk, La., May 5, 2026. The competition demonstrated soldiers' mental toughness, physical fitness and desire to win in any environment. SHARE: Download: Full Size (1.49 MB) Tags: army, training Credit: Army Staff Sgt. Cory Long VIRIN: 260505-A-BM801-9184.JPG Photo Gallery