Summary The US has signed a landmark nuclear deal with Saudi Arabia The US Department of Energy says the "peaceful nuclear co-operation agreement" will provide "great access" for US firms to the Saudi nuclear energy programme A "bilateral safeguards agreement" has also been signed as part of the deal, it says US media reported before the deal was announced that it could potentially allow Saudi Arabia to enrich uranium itself - we're yet to see the full details The fear is that if Saudi Arabia starts enriching its own uranium, hardliners in Iran could be encouraged to secretly race to...