Technical Sgt. Sarah McCaan, a quality assurance specialist from the 140th Wing, Colorado Air National Guard, installs Constantine wire with a Marine from VMFA-115, for a defensive perimeter at a training base in Northern Jordan as part of the Eager Lion exercise. Eager Lion is a U.S. Central Command-directed, irregular warfare-themed exercise focusing on missions the United States and its coalition partners might perform in support of global contingency operations. (U.S. Air National Guard photo by Senior Master Sgt. John P. Rohrer)