Master Sgt. Craig Hillsman assembles a ground laser target designator that he will use to mark targets for incoming aircraft providing close-air support during a training exercise at the Nevada Test and Training Range. Sergeant Hillsman is a joint terminal attack controller instructor with the 6th Combat Training Squadron at Nellis Air Force Base, Nev. A JTAC acts as a liaison between forces on the ground and aircraft working in support of those forces and provides target information prior to providing weapons release authority to the aircraft. (U.S. Air Force photo/Master Sgt. Kevin J. Gruenwald)