National Center for Missing and Exploited Children
http://www.missingkids.org/
Site of a private, non-profit organization working in cooperation with the U.S. Department of Justice dedicated to the search for missing children and pursuit of child protection. Offers training for those involved in child protection and recovery, search assistance to those looking for missing children, and provides publications and resources pertinent to the safety of children. Also provides access to a missing children database.