cops say 17-year-old alex youshock was angry with school leaders. he'll be charged as an adult, serious charges, including attempted murder. we'll take your calls on this, 1-877-tell-hln. back with us, psychotherapist stacey kaiser. also joining us henry lee in the san francisco chronicle. i'm calling this teacher a hero, many others are as well. what could have happened? how bad could it have been if he hadn't acted? >> according to authorities, alex youshock could have well detonated up to ten pipe bombs he had on his person. sources tell us he also intended to use a sword or chain saw to kill any students who were not already maimed or killed by the blast, mike. >> it was bombs first, then whoever was left standing he was going to come at them with a chain saw and the sword. stacey, i've got to bring you in on that. this just sounds brutal, ruthless what was going on in a 17-year-old's mind. >> this is obviously a child who's had a history of problems before. i can't help but wonder somebody had warning signs. this usually comes from agitation, a