victim or the authorities if there was no named intended victim. apart from that, just as a person, i sized up as having a mental illness of some degree but showed no propensity at all to . alisyn: violent tendency. i would certainly not report that to anyone. alisyn: that makes sense. dr. michael stone, thanks so much for your expertise. it is interesting to talk in light of this tragedy, thank you. bill: appears despite all we learned yesterday there is still so much left that we need to learn too. in a moment here it has happened yet again. a man walking blindly off a subway platform. he is okay because a quick-thinking witness who lept to save him. you will hear from that person in a moment. alisyn: plus, north korea, banging the war drum, threating the u.s. once again. we talked to a former state department advisor. when should the u.s. act on these threats? hopefully what will occur is cooler heads will prevail and this will deescalate and