It’s not a topic many people want to talk about, but youth violence is common. “No community — affluent, poor, urban, suburban or rural — is immune from the devastating effects of youth violence,” notes the U.S. Centers for Disease Control and Prevention. It reports that each year U.S. emergency rooms treat more than 692,000 people between the ages of 10 and 24 for injuries from violent assaults. A new study now concludes that some of those injuries — ones due to teen fighting — can cause ...