MARINE CORPS LOGISTICS BASE BARSTOW, Calif. -- Officer Larry Reliford, Marine Corps Police Department, hands a document back to a passenger in a vehicle attempting to come aboard base while Sgt. Michael Diaz, watch commander, observes Reliford’s job proficiency and conduct. MCLB is in the process of turning over the base security duties to civilian officers of the MCPD who began working here Feb. 13. MCLB Barstow is the first Marine Corps installation to begin a military to civilian conversion of its security forces.