Marines augmented to the Marine Corps Recruit Depot San Diego ceremonial platoon rehearse a 21-round rifle volley prior to a memorial service for a deceased Marine Corps Veteran at Rosecrans National Cemetery, July 1. The MCRD SD ceremonial platoon is responsible for ensuring fallen service members in the San Diego receive appropriate honors. - Marines augmented to the Marine Corps Recruit Depot San Diego ceremonial platoon rehearse a 21-round rifle volley prior to a memorial service for a deceased Marine Corps Veteran at Rosecrans National Cemetery, July 1. The MCRD SD ceremonial platoon is responsible for ensuring fallen service members in the San Diego receive appropriate honors.