U.S. Air Force Staff Sgt. Patrick Horning, a Travis Air Force Base Armed Services Whole Blood Processing Laboratory West noncommissioned office in charge of training and education, instructs two frozen blood course students 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)