U.S. Air Force Capt. Monica Ebert, 145th Airlift Wing public affairs officer (middle) has her vein tested by Stephanie Williams (left), donor services technician with the Community Blood Center of the Carolinas (CBCC), prior to attempting a blood donation in a mobile unit at the North Carolina Air National Guard (NCANG) Base, Charlotte Douglas International Airport, April 8, 2018. The CBCC has visited the base for the last four consecutive years collecting pints of blood for patients in need across North and South Carolina. (U.S. Air Force photo by Staff Sgt. Laura J. Montgomery/)