several successive treaties, most recently New START, the United States has reduced its strategic arsenal to 1500 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 Parties (7) (9) Status See also United States Secretary of Transportation White House Office of Energy and Climate Change Policy References External links |- Energy ministers Energy Energy