American Association: Resources for everybody

This list is your guide to societies and associations across the United States and the services they are rendering in the medical, education, legal, sports and various other fields. For instance, the website related to the American Heart Association lets you know what US doctors are doing to fight cardiovascular disease. A cancer research association provides a ray of hope for cancer patients with updates on the latest advances in cancer cure. Sports associations such as those of football and baseball keep their fans updated on their activities. Heard of an association but don't know what it is all about? You can search this list for information you require.
If you know of any other website related to an American association, add it to this list along with a short summary.