Marines of 2nd Battalion, 5th Marine Regiment place Kevlar helmets on an M4 assault carbine in order to form a memorial battle cross during a memorial service hosted by the battalion at the Camp San Mateo helicopter landing zone here, Sept. 28, 2012. The battalion, which recently returned from a seven month deployment from Afghanistan, honored Sgt. Wade D. Wilson, from Webster, Texas, Cpls. Alex Martinez, a native of Elgin, Ill., and Anthony R. Servin, from Riverside, Calif., and Lance Cpl. Joshua E. Witsman, a native of Danville, Ill. Wilson, Martinez, Servin and Witsman all gave their lives to protect their country and fellow Marines during Operation Enduring Freedom.