(LEAD) Nuke envoys of S. Korea, U.S. discuss denuclearization of N. Korea
(ATTN: UPDATES throughout as meeting began, ADDS comments in 5-6th para)
JEJU, South Korea, Nov. 17 (Yonhap) -- The top nuclear envoys of South Korea and the United States met on Friday to discuss cooperation in forcing North Korea to abandon its nucl