Lance Cpl. Joshua Diaz, tower noncommissioned officer at the Horno pistol range, Marine Corps Base Camp Pendleton, transition from one wall to the another utilizing conveniently placed hand holds while following a preset path marked off with yellow tape, April 24. - Lance Cpl. Joshua Diaz, tower noncommissioned officer at the Horno pistol range, Marine Corps Base Camp Pendleton, transition from one wall to the another utilizing conveniently placed hand holds while following a preset path marked off with yellow tape, April 24.