(LEAD) Senior U.S. diplomat to visit Seoul in coming weeks to launch working groups on Oct. summit agreements: State Dept. | Collector

Yonhap News Agency

(LEAD) Senior U.S. diplomat to visit Seoul in coming weeks to launch working groups on Oct. summit agreements: State Dept.

WASHINGTON, May 19 (Yonhap) -- A senior U.S. diplomat will visit Seoul in the co...