a father drops his daughter off at school, kisses her good-bye, waves to her. she's walking up the path. never sees her alive again. gets a call. can't believe it. thinks it's a nightmare and wants to wake up from the nightmare. we want to hear ideas from americans of all backgrounds and beliefs on how we can improve security at our schools. tackle the issue of mental health. this was a sick person, very sick. we had a lot of warning about him being sick. this wasn't a surprise. to the people that knew him, this wasn't even a little -- in fact, some said they were surprised it took so long. what are we doing? what are we doing? we want to ensure that when there are warning signs, we can act and act very quickly. why do we protect our airports