on the eve of this historic summit in sing pork i want to bring in australia's former prime minister kevin rudd, now the president of the asia society policy institute. mr. rudd, thank you for being with us. a few days ago you expressed some cautious optimism about this planned summit in singapore. let me show our viewers what you wrote on twitter. the u.s. is heading in the right direction on the north korean summit but much hinges on how denuclearization is define, and you said to cnbc let's see what falls out of trump owes shake the tree policy. after seeing what has fallen out of that shake the tree policy at the g7, do you still have high hopes? >> i think we ought to look at these two meetings in different contexts. kim jong-un is vastly different from having a spat with justin trudeau. from a geopolitical point of