Showdown", north korea takes on the war. after the singapore summit, the president said there is no longer a nuclear threat. this morning he said after the first summit, all the danger went away. while nuclear weapons testing and long-wrong nuclear ballistic testi testing, there shhas been shor - short-range testing. is in a risk that the president may be being played for this historic photo-op? >> reporter: well, the north koreans always try to play americans, chinese, russians, south koreans. so of course there is that risk. indeed, kim jong-un has not made a strategic decision to give up hi...