The Doriot Climatic Chambers (DCCs) are a pair of very large, highly specialized wind tunnels/environmental chambers located at the U.S. Army’s Soldier Systems Center (SSC) in Natick, Massachusetts. Built in 1952, the Chambers are a unique facility, capable of simulating an extreme range of global weather conditions for the testing of both the physical properties of military equipment and the physiology and adaptations of human subjects.