There are a number of Themes listed here and APHA will be adding subcategories under each theme. Everything will get more and more specific. An example of this is how CDC and Anthrax is a subcategory of Bioterrorism and there are many forms of Bioterrorism as you know. Right now it looks like everything is on the same level but visually we must establish a hierarchy, whether it is by indentations or using drop down submenu items on the menubar item Major Themes. In the future this will just be some pictures of the different themes and perhaps some text.