Senior Airman Scott Lacey performs a preventative maintenance inspection on the TPS-75 radar system using the Air Force Radar Evaluations System Jan. 21, 2013. Lacey is an 727th Expeditionary Air Control Squadron ground radar systems maintainer, deployed from Appleton, Wis. The 727 EACS, also known as “Kingpin,” is composed of 14 career fields that are responsible for monitoring and providing vital air picture information to ensure the successful completion of the Air Tasking Order. (U.S. Air Force photo/Tech. Sgt. Christina M. Styer)