Petty Officer 3rd Class Jesus Pena, a hospital corpsman with the Naval Health Clinic, out of Joint Base Charleston – Weapons Station, S.C., applies a single drop of activation agent into a test tube in preparation of blood clot testing June 1, 2012. All donated blood is thoroughly tested at the clinic to ensure the donated blood is able to be used in the future. (U.S. Air Force photo / Senior Airman Dennis Sloan)

Petty Officer 3rd Class Jesus Pena, a hospital corpsman with the Naval Health Clinic, out of Joint Base Charleston – Weapons Station, S.C., checks to see if the activating blood agent causes clotting to a test specimen June 1, 2012. All donated blood is thoroughly checked at the clinic to ensure the donated blood is able to be used in the future. (U.S. Air Force photo / Airman 1st Class Tom Brading)

Lea Shoup, a medical lab technician with the Naval Health Clinic, out of Joint Base Charleston – Weapons Station, S.C., reviews liquid specimens underneath a medical microscope in the Hematology Laboratory June 1, 2012. Shoup is a seven-year veteran of the Hematology Laboratory. The medical microscopes have an additional microscope attached for training purposes, that are able to detect various items, depending on the liquid being magnified, within the specimen. (U.S. Air Force photo / Airman 1st Class Tom Brading)

Petty Officer 3rd Class Matthew Hampton, a hospital corpsman with the Naval Health Clinic, out of Joint Base Charleston – Weapons Station, S.C., gets his blood drawn by Seaman Jonathan Torres, a hospital corpsman with the Naval Health Clinic at JB Charleston – Weapons Station, S.C., during a routine training exercise June 1, 2012. Torres, originally assigned to the family practice office at the clinic, is training in the laboratory. Hampton is training Torres on how to properly draw blood from patients at the phlebotomy lab. (U.S. Air Force photo / Airman 1st Class Tom Brading)

After blood is drawn in the phlebotomy lab, the withdrawn blood is brought to the centrifuge machine. The machine rotates the fluids with the lid closed, at a high rotating speed around a center axis separating the fluids from the solids with centrifugal force. Red blood cells are denser than plasma cells and during the centrifugal process the two are separated for further testing. (U.S. Air Force photo / Senior Airman Dennis Sloan)

Lea Shoup, a medical lab technician with the Naval Health Clinic, out of Joint Base Charleston – Weapons Station, S.C., displays a crate of frozen donated blood plasma stored at the clinic June 1, 2012. Frozen plasma is able to be stored for years and sent around the world for testing. (U.S. Air Force illustration / Senior Airman Dennis Sloan)