Soldiers assigned to the 1st Squadron (Airborne), 40th Cavalry Regiment secure the gate of the water treatment facility on Joint Base Elmendorf-Richardson, Alaska, Aug. 19, 2013, after a civil disturbance. The soldiers were alerted for a training exercise and made a tactical road march to secure the facility after an earthquake and tsunami in a deployed country under simulated conditions, and were tested on their ability to safeguard the plant and cooperate with local leaders while preventing civil disturbances. (U.S. Air Force photo/Justin Connaher)