None of these issues is agreed unless all of them are agreed. We have a lot of issues in the air that we need to hold together.

They (North Korea) introduced some elements that are not in the agreed principles

You know how you build up trust? You live up to the agreement. You come up with solid implementing schemes that enable you to move forward and show that what you've agreed to do in the agreement, you're actually doing and that's the best way to build up trust.

We agreed that we need to step up the pace to move ahead, but we also agreed there continue to be a lot of differences between the Serbs and Albanians on this,