>> our very strong sanctions by far the strongest sanctions ever imposed and maximum pressure campaign will continue as it has been continuing. >> reporter: with north korean officials maintaining they're still willing to sit down with the u.s. at any time, at any format to resolve the problem. the white house unable to answer if planning staff were still flying to singapore tonight as expected. >> we'll see. we've still got a -- a few hours before that takes place. but as i just said, we'll be prepared if the meeting takes place on june 12th as the president indicated it still could this morn...