U.S. Navy Hospital Corpsman Alfredo Zuniga, 23D Marine Regiment, 4th Marine Division, Marine Forces Reserve, places a tourniquet after his donor became the patient while Petty Officer 2nd Class Anthony Banas checks Cpl. Eric Carranza Flores’ airway for the Valkyrie whole blood transfusion program in San Bruno, CA on Jan. 10, 2024. The Valkyrie Program is a course designed to teach attendees how and when to apply a whole blood transfusion to casualties in a combat environment. (Courtesy Photo)