This report presents the collective results of studies funded under the Office of Juvenile Justice and Delinquency Prevention congressional directive. The studies confirm that young African-American males are disproportionately involved as offenders and victims of violence, that firearms play a large role in juvenile violence, and that gang members are frequently involved in violence. The studies also show that although many juvenile offenders live in impoverished and high-crime areas, the majority of youth who live in such environments are not involved in serious delinquency. Recommendations emphasize four major areas of intervention: gangs, guns, high-risk juveniles, and locations and times of highest risk for juvenile violence. Examples of programs that address each area are provided. It is argued that the findings from these studies provide additional evidence that violence is taking an alarming toll on minority communities, particularly urban African-American and Hispanic communities. Consequently, there is a need for concentrated prevention efforts in those inner-city neighborhoods that experience the highest level of juvenile violence. Chapters include "Characteristics and Patterns of At-Risk Juveniles and Factors that Contribute to Violence Committed by or against Juveniles,""Accessibility of Firearms and the Use of Firearms by or against Juveniles,""Conditions Associated with an Increase in Violence Committed by or against Juveniles,""Recommendations for Prevention and Control of Juvenile Violence." (Contains 43 references.) (GCP)