 In the late 1960s, worldwide terrorism and acts of violence prompted a review of procedures for safeguarding these materials.As a result, a comprehensive new series of regulations and equipment was developed to enhance the safety and security of these materials in transit.The Transportation Safeguards Division (TSD), renamed Office of Secure Transportation (OST) in the late 1990s, was subsequently established in 1975 at the Department of Energy's (DOE) Albuquerque Operations Office.