Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. North Korea Walks Out of Nuclear Talks, Blaming US William Gallo SEOUL - North Korea has angrily walked away from working-level nuclear talks with the United States. Pyongyang's top negotiator said he was "greatly disappointed" with Washington's inflexible approach. The first substantive nuclear negotiations in months between North Korea and the U.S. broke down after just one day in Stockholm, Sweden. North Korea's top nuclear envoy says the talks failed because the U.S. would not abandon its old approach. The U.S. quickly disputed that characterization, saying the 8-and-a-half-hour talks went "good" and that the U.S. brought "creative ideas." The breakdown raises the possibility North Korea will intensify its provocations, days after testing a new medium-range ballistic missile. But the North's decision could also amount to a negotiating tactic meant to raise pressure on Washington. U.S. President Donald Trump appeared to use a similar tactic this February in Vietnam, when he abruptly walked away from a summit with North Korean leader Kim Jong Un. .