The second group links to some important government sites, including The White House, both houses of congress, and FirstGov.gov, the main government portal. The third group of links is the meat of the site. It provides categories to click on for disability-related resources. In each category, there may be links to subcategories. The bones of this site are the links to the other resources in the federal government, with descriptions.
Navigation is smooth, with the caveats below.
The list of categories and introductory links are on each page. And each page in a given category has links to its subcategories, if any. The last group of links on the home page is the Hot Topics section. Some people may find this version easier to navigate and read. However, it isn't clear that all changes made to one version of the site are automatically made to the pages of the other version.