Plutonium

Plutonium carrying British ship headed for US, leaves Japan

An armed British ship believed to be carrying enough plutonium to make about 40 atomic bombs has left a port in eastern Japan to transport the shipment to the US for storage.

British ships arrive in Japan to transport plutonium to the US

Two British ships have arrived in eastern Japan to transport a shipment of plutonium — enough to make dozens of atomic bombs — to the US for storage under a bilateral agreement.

What exactly are N Korea's scientists planning to explode?

The last two tests are believed to have been of plutonium devices, but the next logical step for Pyongyang's ambitious nuclear programme could be to conduct a highly enriched uranium explosion.