Master Chief Charlotte Osborn, command master chief, 1st Dental Battalion, 1st Marine Logistics Group, passes a piece of cake to Chief Petty Officer Sandra Go-Lubiano, a senior enlisted leader with 1st Dn. Bn., during the cake-cutting ceremony for the 120th anniversary of the chief petty officer rating, aboard Camp Pendleton, Calif., Monday, April 1, 2013. (U.S. Marine Corps photo by Cpl. Laura Gauna/Released) - Master Chief Charlotte Osborn, command master chief, 1st Dental Battalion, 1st Marine Logistics Group, passes a piece of cake to Chief Petty Officer Sandra Go-Lubiano, a senior enlisted leader with 1st Dn. Bn., during the cake-cutting ceremony for the 120th anniversary of the chief petty officer rating, aboard Camp Pendleton, Calif., Monday, April 1, 2013. (U.S. Marine Corps photo by Cpl. Laura Gauna/Released)