The world's attention is currently focussed on developments on the Korean peninsula. This is due in large part because of the remarks made by US President Trump at the recent UN General Assembly (UNGA). North Korea has been a neuralgic problem since the end of hostilities in 1953. This week the London based Royal United Services Institute (RUSI) has published a paper 'Preparing for War in Korea'; a title which its author Professor Malcolm Chalmers, the Deputy Director General of RUSI, hastens to stress does not imply any inevitability, reports Nick Watts