U.S. 'not willing to wait too long' for North Korea to act - U.N. envoy

U.S. Ambassador to the United Nations Nikki Haley speaks at a press briefing at U.N. headquarters in New York City, New York, U.S., July 20, 2018. REUTERS/Brendan McDermid

CUCUTA, Colombia (Reuters) - The United States is "not willing to wait for too long" for North Korea to take steps toward denuclearisation, U.S. Ambassador to the United Nations Nikki Haley said on Wednesday.

At a landmark summit in June, North Korean leader Kim Jong Un and U.S. President Donald Trump pledged to work to end Pyongyang's nuclear weapons programs, but the two countries have been struggling to reach a detailed accord to meet that goal.