U.S. Marine Cpl. Mark A. Tirona sets a portable laser designator rangefinder onto a target as Pfc. Daquaruis Abner listens for range control on a RT-1796 (P)(C) Multiband Multimission radio at Mt. Barrow, East Imperial, Calif., on Oct. 7, 2010. Marines are participating in an AH-1 Cobra Close Air Support exercise during Weapons and Tactics Instructors Course 1-11 hosted by Marine Aviation Weapons and Tactics Squadron One.