Support WBUR'You Can't Stop Hope With A Bullet': Tucson's FutureAlan GreenblattJanuary 13, 2011 ShareFive-year-old Rachel Crabb (center) holds hands with teachers, parents and other students during a moment of silence for her slain schoolmate, Christina Green, at Mesa Verde Elementary School in Tucson, Ariz., earlier this week. (Getty Images)