THAAD U.S. Pacific Command has deployed the first elements of the Terminal High Altitude Area Defense system, known as THAAD, to South Korea, implementing the U.S.-South Korean alliance’s July 2016 decision to bring the defensive capability to the Korean Peninsula. DoD photo SHARE: Download: Full Size (1.08 MB) Credit: Missile Defense Agency VIRIN: 170307-D-ZZ999-307.JPG Photo Gallery