(LEAD) S. Korea's foreign, defense ministers arrive in Washington for '2+2' talks

(ATTN: UPDATES with quotes from Yun and Han, details in paras 5, 7-8, 10)By Chang Jae-soon

WASHINGTON, Oct. 18 (Yonhap) -- South Korea's foreign and defense ministers arrived in Washington on Tuesday for security and alliance talks with their U.S. c