180211-N-VY375-003 BELL GARDENS, Calif. (Feb.11, 2018) Reserve Sailors assigned to Navy Operational Support Center (NOSC) Los Angeles take the E-4 to E-7 advancement exam in the drill hall at NOSC Los Angeles. Reserve Sailors supplement and work alongside their active duty counterparts at sea, on shore and in the air, covering all rates and jobs that the Navy has to offer. (U.S. Navy photo by Mass Communication Specialist 2nd Class Pyoung K. Yi/Released)