U.S. leaves major decision making about denuclearization on N. Korea

The United States has closed gaps with North Korea on a number of issues about denuclearization, but important areas remain to make progress on, a senior State Department official said on Thursday.

"It is going to be up to the North Koreans to some extent to decide to engage on meeting some of the expectations that are out there on denuclearization," the official told reporters in a briefing.