Site of Pakistan's Chagai-II nuclear bomb tests

The sixth Pakistani nuclear test (May 30, 1998) at Kharan was a successful test of a sophisticated, compact, but powerful bomb designed to be carried by missiles. The Pakistanis are believed to be spiking their plutonium based nuclear weapons with tritium. Only a few grams of tritium can result in an increase of the explosive yield by 300% to 400%.