Meanwhile, the top nuclear envoys of South Korea, the U.S. and Japan met Tuesday in New York and reaffirmed their three-way cooperation on North Korea nuclear issues.<br />That's Seoul's chief nuclear negotiator, Lee Do-hoon and his U.S. and Japanese counterparts -- Stephen Biegun and Shigeki Takizaki.<br />This was their first trilateral since Takizaki was appointed nuclear envoy earlier this month.<br />Earlier the same day, the national security advisors of South Korea and the U.S. also met on the same issue.<br />
