United States Secretary of Energy

In addition to responsibilities related to generation and use of energy, the secretary is the most senior official other than the president of the United States or secretary of defense with primary responsibility for the nation's approximately 3,800 viable nuclear weapons. This arrangement is intended to maintain full civilian control over strategic weapons, except as directed by the president for specific military uses. The department of energy is responsible for the building, maintenance, and disposal of all nuclear weapons within the United States' arsenal in addition to safeguarding these weapons when they are not actively deployed in military service. Under the terms of several successive treaties, most recently New START, the United States has reduced its strategic arsenal to 1,500 deployed weapons. Consequently, many older legacy weapons systems have been dismantled or scheduled for dismantlement, with their core radioactive fuel - generally plutonium - being reprocessed into reactor-grade or space exploration fuel. ==List of secretaries of energy==