Army Sergeant Sgt. 1st Class Adam Derrick gives instruction on the proper way to navigate an obstacle for competitors in the 2015 U.S. Army Reserve Best Warrior Competition on Fort Bragg, N.C., May 6, 2015. Derrick is a drill sergeant assigned to the 397th Regiment. Army Sergeant Sgt. 1st Class Adam Derrick gives instruction on the proper way to navigate an obstacle for competitors in the 2015 U.S. Army Reserve Best Warrior Competition on Fort Bragg, N.C., May 6, 2015. Derrick is a drill sergeant assigned to the 397th Regiment. SHARE: Download: Full Size (2.15 MB) Tags: Photo Essays Credit: VIRIN: 605111-X-VRB22-154.jpg Photo Gallery