A member of the 28th Civil Engineer Squadron Fire Department directs fellow Airmen as they work on a mobile aircraft arresting system following a landing simulation during a phase II operational readiness exercise at Ellsworth Air Force Base, S.D. July 11, 2013. The Fire Department is responsible for responding to the MAAS being tripped, unhooking the aircraft and resetting the cable within a limited time to ensure system availability. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)