 This room holds enough energy to power a large city for three years. It's inside a very special bank in far eastern Kazakhstan that contains valuable nuclear material as a backup fuel supply for countries that rely on nuclear power. This secure facility was set up by the International Atomic Energy Agency and stores 90 tonnes of low-enriched uranium in case a country is unable to get its nuclear fuel on the open market or by any other means. The uranium for this latest delivery originated in Kazakhstan and was processed in Russia before being transported by high-security train to complete the bank's stocks.