A new study is estimating the US government is spending at least $52 billion a year on nuclear weapons and nuclear weapons-related programs. The estimate was calculated by the Carnegie Endowment for International Peace. The majority of the $52 billion is spent on upgrading, operating and sustaining the US nuclear arsenal. Only about ten percent of the money is devoted to controlling the spread of nuclear weapons and technology. In other nuclear news, the State Department has slapped sanctions on thirteen individuals and three private companies because of their involvement in the nuclear proliferation network associated with Pakistani scientist A.Q. Khan. The sanctions were issued four years after Khan was put under house arrest in Pakistan.