Amy Goldberg, Temple Hospital’s chief of trauma and surgical critical care, stood in the emergency room and held up a blunt-looking metal tool so the 8th grade boys could see it. “We take an instrument like this, lift up on the breast bone and actually cut straight across it,” she explained. Goldberg’s description of the extraordinary steps she takes to save gunshot victims are part of “Cradle to Grave,” a program she created in 2006, after a spike in teen gun deaths, to show middle school students the true consequences of gun violence.