In 1946, the Chemical Warfare Service was re-designated as the "U.S. Army Chemical Corps", a name the branch still uses. With the change came the added mission of defending against nuclear warfare, in addition, the corps continued to refine its offensive and defensive chemical capabilities. Immediately following World War II, production of U.S. biological warfare (BW) agents went from "factory-level to laboratory-level". Meanwhile, work on BW delivery systems increased. Live testing in Panama was carried out during the San Jose Project.