Senior Airman Brandy Johnson, Blood Donor Center medical laboratory technician, draws blood for testing from Staff Sgt. Taylor Altricht, Blood Donor Center NCO-in-charge, before platelet donation Dec. 13, 2019 at Joint Base San Antonio-Lackland, Texas. The JBSA-Lackland Blood Donor Center is the Defense Department’s only blood donor test center. (U.S. Air Force photo by Tech. Sgt. Katherine Spessa/Released)