Hospital Corpsman Jonathan Trotti, a native of Orange, Texas, places a blood sample into a centrifuge to separate red blood cells from plasma in the medical department of the aircraft carrier USS Ronald Reagan (CVN 76). Reagan is homeported in San Diego and is undergoing a Planned Incremental Availability (PIA) maintenance period at Naval Base Coronado. (U.S. Navy photo by Mass Communication Specialist 3rd Class Timothy Schumaker/Released)