reporter: north korean policy is expected to change quickly from moon jae-in s pro-engagement push to yoon s hardline stance. during the campaign, yoon floated the idea of a preemptive strike if pyongyang looked close to a missile lauch. there is chances that such hard line will lead to military clashes, which might escalate. reporter: pressing domestic issues also await yoon on day one. covid induced economic pain, polarization, population de decline. the country that voted him in now waits to see what kind of leader he will be. and in his inauguration speech, he also said that he wants to be a president that plays more of a role on the international stage, criticizing former president moon jae-in. he has said in the past that he thought more should have been done to support ukraine, for example, after russia s