Official U.S. Navy file photo of a surgeon performing a bone marrow harvest operation. The procedure consists of inserting a large-gauge syringe into an area of the hip and extracting the bone marrow. The bone marrow is then transfused into the recipient and helps recreate and replenish T-cells and the white and red blood cells. (U.S. Navy photo by Petty Officer 2nd Class Chad McNeeley/Released)