kim jong-un and president trump. japan's foreign minister says north korea's change in position, quoting now, is the result of maximum pressure from japan, the u.s. and south korea, end quote. and that they need to keep pressuring the north to give up their nuclear programs. neither side is making concessions at any time. >> make no mistake about it, while these negotiations are going on, there will be no concessions made. the activity to disrupt the north korean economy, to put pressure on north korea, to galvanize the world in the way you have countries from the middle east and europe and asia putting sanctions on north korea, those will continue and we'll see how talks and negotiations proceed. >> i want to bring in now jamie metzel. he has been working with the national security council and the state department under president clinton. he is now a senior fellow with the atlantic council.