(3rd LD) S. Korea, U.S. pick southern county of Seongju to deploy THAAD

(ATTN: UPDATES with more info in paras 8, 14, 18-19; ADDS photo)

SEOUL, July 13 (Yonhap) -- South Korea and the United States picked the mountainous southern town of Seongju as the location to deploy a Terminal High Altitude Area Defense (THAAD) syste