Trump-Kim summit: peace in our time or just a piece of paper?

By coming to Singapore and holding this summit Donald Trump has shown he is prepared to gamble in the cause of peace, and if nothing else he has transformed the rhetoric from dark threats about nuclear annihilation to warm words about friendship and new beginnings. The President left with the deal he acclaimed light on detail, and it appears to come with a clutch of concessions by the US which no-one had predicted.