probably more capable than the south korean counterparts. reporter: north korean special forces have launched several raids inside south korea and made multiple attempts to assassinate south korean presidents in the past. and kim s regime has responded saying if that happens, north korea is going to reduce the south korean capital, seoul, to ashes and wipe the u.s. territory of guam from the face to have earth. wolf? brian, it wasn t long ago that north korea held its own drills to practice attacking the south korean president. reporter: they constructed a mockup of the blue white house, and south korean forces had to step up security. her own father survived an assassination attempt by a north korean agent in 1974 when he was president.