It's a stunning number: 36 students have been gunned down in Chicago since the beginning of the school year. CNN SIU reporter Abbie Boudreau has filed gut-wrenching stories on families caught in the crossfire. When we saw Chicago high school senior Ronnie Mosley in Abbie's story, we knew you would want to hear more from him. He became an activist when his best friend was shot dead two years ago. Watch CNN NewsRoom's Kyra Phillips' conversation with this young man. You'll be as impressed as we were with his courage and conviction.