Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Seven middle-school age African American adolescents in various poses are backed by a beige brick wall with the caption printed across the wall in black letters.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)