Nearly 7,800,000 individuals aged 12 to 17 (30.9% of America's adolescent population) participated in any of three violent behaviors over the past year, asserts a study by the Substance Abuse and Mental Health Services Administration, Washington, D.C.

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Nearly 7,800,000 individuals aged 12 to 17 (30.9% of America's adolescent population) participated in any of three violent behaviors over the past year, asserts a study by the Substance Abuse and Mental Health Services Administration, Washington, D.C. Those with "A" averages in school were less than half as likely as adolescents...