The chief U.N. nuclear negotiator said Wednesday after talks in Pyongyang that North Korea was still committed to the denuclearization of the Korean peninsula. Mohamed ElBaradei, head of the Vienna-based International Atomic Energy Agency, described the talks as "quite useful" and said North Korea "reiterated they are committed to the denuclearization of the Korean peninsula," The Associated Press reported. ElBaradei's one-day trip comes ahead of international talks in Beijing on Monday that will look at progress after a milestone Feb. 13 deal in which North Korea has 60 days to shut down and seal its Yongbyon nuclear reactor in exchange for economic aid and political concessions.