Petty Officer Mark A. Mayo will be posthumously awarded the Navy and Marine Corps Medal on Friday at Arlington National Cemetery. Mayo, 24, was killed during a shooting incident at Naval Station Norfolk Monday, Mar. 24, where he was assigned to Naval Security Forces. The Navy and Marine Corps Medal is the highest non-combat decoration awarded for heroism by the United States Department of the Navy to the members of the United States Navy and United States Marine Corps. Vice Admiral Mark Ferguson, vice chief of naval operations, will present the award to Mayo’s family in a private ceremony prior to the burial.