Six months ago I read a fascinating series of blog posts that talk about specifically how the airfare system evolved. This blog was created by a former TWA agent from San Francisco and did a better job than anything else about describing both how fare rules evolved and the logic that goes behind creating mileage runs. I want to share a link with a friend...but sadly cannot find the site on Google. Does anyone have a bookmark, or some other way of helping me find this site? Thanks.