According to the Times yesterday (no, go and find your own damn link!), Greenpeace is claiming a French consignment of reprocessed nuclear fuel to Japan contains enough bomb-grade plutonium to make 225 nuclear weapons and is at risk from being hijacked by terrorists.
The shipment of mixed oxide (MOX), a blend of plutonium and reprocessed uranium, is being carried on two ships from the British-based firm Pacific Nuclear Transport from Cherbourg this week. Areva, the reprocessing company, confirmed the shipment and said the vessels would be "armed and protected by specifically trained guards from Britain".
Just so you know, you recover bomb-grade plutonium by re-processing spent nuclear fuel and separating the plutonium from remaining uranium and waste fission products.