U.S. Navy Construction Electrician 1ST Class Jason Knorr (standing left) and Construction mechanic 3rd Class Jesus Coronado (kneeling right), both with Naval Mobile Construction Battalion 1 (NMCB-1), secure an RF cable to the mast of an OE-254 Omni-Directional Antenna during a graded field communication exercise onboard Naval Construction Battalion Center (NCBC) Gulfport, Miss., on May 21, 2007, as they work in preparation for the upcoming field exercise Operation Desert Heat, which will sharpen their combat and contingency construction capabilities. (U.S. Navy photo by Mass Communication SPECIALIST 3rd Class Ja'lon A. Rhinehart) (Released)