against the united states south korea joined the military exercise, especially the demonstration by umbf-22, f-35 stealth fighter jets. so north korea wanted to show if united states escalate, north korea will attack south korea by missiles. >> the j-alert nationwide emergency system issued an alert that one of them seemed to be flying over japan. it was later confirmed that it had actually disappeared over the sea of japan. what do you make of this? >> yes, north korea, usually japanese self-defense force lost contact during the tracking the object. it is possible that the object was broken. but another possibility is that the target was fixed the origin. i'm not sure because information is not enough. i think the data have possibilities not so high. >> what do you predict north korea will do next? >> yes, north korea need to show its intention by launching missile today because united states, south korea respond to the missile launch yesterday. but it means the escalate/deescalate concept did not work in this moment. so north korea wanted to use the nuclear weapon as means of the esca