Navigating the site 1. The main navigational bar at the top of each page represents the main topics by which we have subdivided the site. For a complete explanation of these navigation bars, please see the About this site page. You may navigate our site using this top bar or the footer.
Most pages have side navigational bars.
This bar serves as your point of reference for the section you are currently visiting and provides links to related areas, either within or outside of the site. Optimizing the site This site and its graphics are designed to run effectively with all full-service browsers. If your browser is text only, or if your connection is slow, you may choose not to load images. You can enable this feature using your browser. If images are turned off, you must navigate the site using the navigational footer at the bottom of each page.