Should CEOs be Chairmen?

This was a very interesting artcle that i had found on BusinessWeek. I was never really aware of the skills one needs to have to a chairmen of a business. This was very interesting and very easy to read. Without even knowing the inside scope on how to become a chairmen and how to become a CEO, it helped me understand and know the difference between them. Great Article.
Site for this article.
http://www.businessweek.com/managing/content/nov2009/ca20091110_906175.htm