EGLIN AIR FORCE BASE, Fla. -- U.S. Air Force Airmen assigned to the 1st Special Operations Support Squadron and the 417th Flight Test Squadron conduct Operation Blood Rain at Eglin Air Force Base, Florida, Aug. 5, 2021. Operation Blood Rain is a research project in support of United States Special Operations Command, testing the safety of blood after it has experienced environmental and gravitational forces during the air drop, and assesses its feasibility for transfusion in a patient.