Kim Hong-Ji/Reuters On Thursday morning, Mark Lippert, the American ambassador to South Korea, was viciously attacked by a razor-wielding assailant moments before Lippert was set to speak at a meeting in Seoul. “South and North Korea should be reunified," the attacker yelled as he gashed Lippert's face and wrist, causing wounds that would ultimately require two-and-a-half hours of surgery and some 80 stitches.