As the name of the agency suggests, 'Department of Defense,' the defense refers to the United States of America - not the defense of South Korea, not the defense of Ukraine, not the defense of Syria or Germany.

If Iran and North Korea, by some horrible, devilish, nightmarish scenario, got together and went to war at the same time, one against Saudi Arabia and one against South Korea, I don't know what we would do about that. I don't know that we could stop them short of using nuclear weapons.

Since the Korean War, U.S. and South Korea have established an enduring friendship with shared interests, such as denuclearizing the Korean Peninsula, combating aggression abroad and developing our economies.

When I was almost two years old, my grandmother flew from Hongcheon, South Korea, to Flushing, Queens, to take care of me.

South Korea is a vigorous democracy, with strong judicial institutions and a commitment to the rule of law.

We've been worried for some time that one of the ways that North Korea can retaliate against further escalation of tensions is via cyber, and particularly attacks against our financial sector. This is something they have really perfected as an art against South Korea.