U.S. Air Force and U.S. Army frozen blood course students retrieve a thawed blood bag to prepare it for deglycerolization at Joint Base Elmendorf-Richardson, Alaska, Sept. 24, 2021. The mobile blood course, traditionally located at Travis Air Force Base, California, was hosted by Joint Base Elmendorf-Richardson, Alaska to ensure the military’s capability to freeze, store, and transport blood for contingency operations. (U.S. Air Force photo by Senior Airman Jordan Smith)