Caravelli, a long-time former CIA analyst who also served on the staff of the White House National Security Council and as an official with the U.S. Department of Energy, said Pakistan’s nuclear arsenal probably consists of 100 nuclear weapons and that there are efforts to expand it.  He noted that the purpose of the Pakistani nuclear arsenal is to deter Pakistan’s archrival India. For this reason most of the country’s nuclear sites are located in the northwest of the country to place them as far as possible from India.