Spc. Lauren O'Neal, 153rd Blood Support Detachment medical laboratory technician, prepares Pfc. Zeon Battise, Guard Force, to donate platelets at Craig Joint Theater Hospital on Bagram Airfield, Afghanistan, Dec. 31, 2015. In order to extract platelets, a critical life saving blood component, apherisis machines are used to draw blood and return the unused portions to the donor. (U.S. Air Force photo/Tech. Sgt. Robert Cloys)