assistant secretary for homeland security and now a at harvard. i know yo spent a lot of time thinking about this. and you're a parent yourself. how do you explain the unexplicable to kids? answering the question of why it happened. >> don't do the impossible. some things are unexplainable. whatever crisis we learned over the years sort of three major things. one is don't your kids. they know what's going on. instead of talking to they will, listen. ask not directed questions like are your friend talking about this? did the teachers talk about that? elicit their response rather than giving them yours. and the sektd thing that's key is we have learned in crisis that resilient kids come from resilient parents. you want to show moving forward that your you're prepared for what's happening. and you have a grip on the situation. yelling at the tv is not a good