Special Feature: What Is THAAD, What Does It Do, and Why Is China Opposed?

앵커리포트: 사드와 외교관계 Over the past months - and particularly in the weeks since the South Korean government announced its decision to deploy a sophisticated U.S. missile defense system to the southern part of this country, there have been a lot of talk surrounding that decision. Not only within this country but all over the world -- with foreign media publishing articles and commentaries showing great interest with keywords like THAAD, South Korea, U.S., and China. But, what's missing and at at the core of