A Naval Medical Center Portsmouth laboratory technician uses a crimper to stop the flow of blood in a tube before removing the needle from a donor during an Armed Services Blood Program donation drive at Langley Air Force Base, Va., Aug. 10, 2016. According to the ASBP, if someone is unable to donate blood, they can help by informing others about the donation process and help them through the process. (U.S. Air Force photo by Airman 1st Class Tristan Biese)