Official nuclear powers include the US with an estimated 5,200 nuclear warheads and 2,700 operationally deployed warheads (2,200 strategic and 500 nonstrategic); Russia with an estimated 14,000 nuclear weapons, although the total is uncertain because there is no accurate count of tactical weapons; France with about 300 nuclear warheads in 2008; Britain, whose nuclear stockpile consists of fewer than 200 strategic and “sub-strategic” warheads on four Vanguard-class nuclear-powered ballistic missile submarines and China, which is estimated to have about 250 strategic and tactical nuclear weapons and sufficient stocks of fissile material to produce a much larger arsenal.
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