The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
The American Disabilities Act (ADA) defines a person with a disability as someone who has a physical or mental impairment that substantially limits one or more major life activities. People living with a disability have a significantly higher likelihood of being overweight, developing cardiovascular disease and smoking tobacco as compared to the general population.