An 8th Security Forces Airman stands guard as a 35th Fighter Squadron F-16 prepares to land on the Alternate Landing Surface at Kunsan Air Base, Republic of Korea, Mar. 19, 2014. The ALS was activated and utilized to test the Wolf Pack's ability to land aircraft in the event that the primary runway is unavailable. (U.S. Air Force photo by Staff Sgt. Clayton Lenhardt/Released)