smoking at the airport illegal?

I read an article in the Denver post called The Denver Post - Advocate targets smoking areas at DIA, this article was about the smoking ban and the exemption in Denver international airport. They now want to eliminate smoking in the entire airport. This matters to me because I fly In and out of D.I.A. a lot due to hockey and my mother is a smoker. If they completely take smoking out then the people who smoke will not have any place to smoke except for outside and once in the terminal it is very hard to get outside. Some people think that smoking calms them down and if they need to smoke to calm themselves before they get on the plane then I am all for that. This will make the people around them calmer too because people can pick up on those kind of things and if someone needs that then they should be able to get what they need. This also goes into the civil rights category because people think that they should be able to do what they want such as smoke where they want. And if restaurants want there to be smoking in their facility then they should because they are the ones who run the establishment.