[u'U.S. Ambassador to South Korea Mark Lippert eaves a lecture hall for a hospital in Seoul, South Korea, Thursday, March 5, 2015 after being attacked by a man. Lippert was attacked by a man wielding a razor and screaming that the rival Koreas should be unified, South Korean police and media said Thursday. (AP Photo/Yonhap, Kim Ju-Sung) KOREA OUT', u'U.S. Ambassador to South Korea Mark Lippert leaves a lecture hall for a hospital in Seoul, South Korea, Thursday, March 5, 2015 after being attacked by a man. Lippert was slashed on the face and wrist by a man wielding a knife with a 10-inch blade and screaming that the rival Koreas should be unified, South Korean police said Thursday. (AP Photo/Yonhap, Kim Ju-Sung) KOREA OUT']