The document summarizes adolescent health risk behaviors in the United States. It discusses that the leading causes of death for 15-19 year olds are unintentional injury, homicide, and suicide. Motor vehicle crashes are a major cause of adolescent deaths, often due to inexperience, speeding, lack of seatbelt use, and drinking. Around 45-50% of adolescent deaths from violence involved alcohol use. The document also provides data on the prevalence of binge drinking, drinking and driving, and risky sexual behaviors among adolescents. It briefly discusses smoking, obesity trends, and weight control behaviors among youth.