. >> reporter: i want to go back to erik fisher, for people who were not here and whose children did not go through the trauma, and yet i think as any parent watching the story unfold from around the country, we are trying to figure out how do i tell my child honestly they will be safe in school when i cannot honestly say that. and as you know they know when you're lying and trying not to lie but you also want to give them reassurance. what do you do? >> i'm careful to not make promises. i never tell my 7-year-old daughter i promise because we cannot make promises over things we do not control. i really try to say this is what we are doing and these are the plans i have. make sure you know you have an emergency plan if you get separated, what's your emergency call and where's a safe place to go that's a meeting place or things like that. those are things important to have in place. because the more people feel like they have a plan, the less stress that occurs in a situation in the long-term stress. dr. gupta made a great point about watching sleep because of the stress hormones secr