The bombing of Nagasaki three days after Hiroshima, with a plutonium device, is handled in brisk but sufficient detail.

The second event occurred three days later when United States dropped a plutonium implosion-type device on the city of Nagasaki.

It is reported to be a plutonium device with yield of 20kt.

He worked on the firing unit that was used for the implosion of the plutonium device.

Trinity was a test of an implosion-design plutonium device.

Dr. Khan was shown what was described to him as three plutonium devices, he reported.

Then there is the plutonium device, which has a complicated 'implosion' design.

A sixth nuclear test, at Kharan, was a plutonium device.

He had been responsible for the design of the plutonium device captured in Edmonton.

It has a yield of 120 kts and is a pure plutonium device.