ROTA, Spain (Dec. 20, 2010) Gunner's Mate 3rd Class Mark Sorokey, assigned to Headquarters Company of Naval Mobile Construction Battalion (NMCB) 74, calibrates an Advanced Combat Optical Gunsight to battle site zero using a laser bore light. NMCB-74 is deployed to Camp Mitchell at Naval Station Rota, Spain, supporting Combined Joint Task Force (CTF) 68. (U.S. Navy photo by Mass Communication Specialist 1st Class Ryan G. Wilber/Released)
