While the Florida trial that is weighing the question of whether 29-year-old George Zimmerman committed second-degree murder, manslaughter, or is not guilty of a crime in the death of 17-year-old Trayvon Martin has dominated the media in recent days, the federal Centers for Disease Control and Prevention has just released a study revealing that the homicide rate among Americans in the 10- to 24-year-old age group hit a 30-year low in 2010, the most recent year in the study. “The homicide rate among persons aged 10-24 years in 2010 was 7.5 percent per 100,000, the lowest in the 30-year study...