Staff Sgt. Christopher Mursh explains to Airman 1st Class Elliot Westerman the requirements before he begins digging during a Visitor's Center project on Seymour Johnson Air Force Base, N.C., Oct. 4, 2011. An excavator is used to remove dirt to build a sidewalk, which allows the sidewalk to last longer without grass or weeds growing underneath and forming cracks. Mursh is a 4th Civil Engineer Squadron heavy equipment operator and hails from Whitesboro, N.Y. Westerman is a 4 CES heavy equipment operator and hails from Boswell, Penn. (U.S. Air Force photo by Senior Airman Whitney Stanfield)