The photographs of the three individuals are used with the permission of the U.S. Census Bureau, Public Information Office.

The photograph of the couple is the work of photographer Rhoda Baer and is used with the permission of the National Cancer Institute.

The photograph of the Mackinac Bridge at sunset ("Mackinac Bridge II Panorama") is the copyrighted work of Michigan-based fine art photographer Derek Wong (http://beyondphotography.net.tc) and is used with his permission.