Donald Trump and Kim Jong Un both came to Singapore, had an apparently amiable conversation and went home in peace.  President Trump called this a game-changing triumph, but only weeks later admitted that North Korea hadn’t changed, and was still a dangerous nuclear threat to America. So are the analysts who say Trump gave North Korea more and got less than his Presidential predecessors correct?  Joe Cirinicione of the Ploughshares Fund is one of our top experts on nuclear weapons and diplomacy with Pyongyang.