attention. the obvious thing would be that now that they ve launched short-range missiles and the u.s. didn t respond that they could then go to a medium-range missile, perhaps a static rocket engine test of a long range missile and indicate the icbm project is progressing. reporter: kim jong-un was much more surprised and embarrassed trump walked out on him in hanoi than either side let on. during that summit kim demanded a complete end to sanctions on north korea. in exchange for partially dismantling his nuclear facility, something trump refused to accept. kim jong-un is frustrated. the last summit in hanoi was a failure for him with his own people, he had promised sanctions relief. american investment, possibly a nuclear deal and it was a spectacular failure. reporter: tonight, north