Nuclear weapons are designed to cause extreme loss of life, destruction of the built and natural environment and long-lasting radiological contamination. In the normal world, nuclear regulators would never allow high explosives to go anywhere near fissile material (the 'fuel' for a nuclear explosion). Such is the risk taken in the production, transport, storage and deployment of nuclear weapons. Nevertheless, safety underpins any nuclear weapons regime, primarily to ensure that the weapons will perform as required if it is delivered; the safety of workers, the military, the environment and ordinary people is secondary. Nuclear safety policy is weakened the more organisations there are involved in its procedures, the poorer the standard of nuclear military infrastructure and the more risks taken during transport. Accident contingency plans provide some protection, but in the event would prove inadequate.