American Indians in the United States belong to approximately 562 federally recognized tribes — as well as bands and clans — that have a distinct history, culture, and often a separate language (Federal Register, Vol. 68, No. 234, December 5, 2003). Three hundred forty-one federally recognized American Indian tribes are located in the lower 48 States. Participation by Alaska Native tribes or villages was not extensive enough to enable their inclusion in any related reports, which instead describe data from Indian tribes located in the lower 48 States of the continental United States.