South Korea is moving swiftly to install four new Terminal High Altitude Area Defense (THAAD) rocket launchers on its territory. They will be installed this week, despite protests from residents who have cited numerous concerns over the missile defense system. US Forces Korea (USFK) will deploy the launchers at its new base in Seongju, some 300 kilometers (186 miles) south of Seoul, on Thursday, according to the South Korean defense ministry, cited by Yonhap news agency. The ministry stressed the urgent need to mobilize the launchers amid growing threats from North Korea, which had its sixth and most powerful nuclear test on Sunday. Although the ministry did not provide an exact time for the installation, a residents' group cited by Yonhap said it had confirmed the plan "through various channels," adding…