U.S. Air Force Staff Sgt. Samuel Weaver, 1st Combat Camera Squadron combat cyber transport systems craftsman, switches out the M4 carbine rifle bolt of Staff Sgt. Corey Hook, 1st CTCS combat photojournalist, during Exercise Scorpion Lens 15, North Auxiliary Airfield, S.C., Feb. 9, 2015. Exercise Scorpion Lens 2015 is an annual exercise designed to validate the ability of Air Force Combat Camera Airmen to survive, operate, and provide directed imagery capability in an austere environment including in the presence of chemical, biological, radiological, and nuclear contamination. Combat Camera Airmen document a full range of military operations in support of senior leaders and combatant commanders. (U.S. Air Force photo by Senior Airman Logan Brandt/Released)