 Office of Secure Transportation

The U.S. Department of Energy/National Nuclear Security Administration's Office of Secure Transportation (OST) provides safe and secure transportation of nuclear weapons and components and special nuclear materials, and conducts other missions supporting the national security of the United States of America.Since 1947, the U.S. Department of Energy (DOE) and its predecessor agencies have moved nuclear weapons, nuclear weapons components, and special nuclear materials by a variety of commercial and government transportation modes.