U.S. continuously upgrading defense to protect homeland against N. Kor… stocking 0 51 04.18 14:11 https://youtu.be/4eyqeEBccOw + 7 美 “北 ICBM 대응 괌 등 본토 방어 적극적 강화” A senior Pentagon official says the U.S. is continuously improving its mainland ...