>> well, it kind of goes back to the arrowhead/kauffman complex. when that was originally done, it was -- the basic idea was done by an architect named charles deton, who came up with this motion of a rolling roof -- >> we talk about it all the time. >> -- that would sit between the two stadiums and could roll in one direction or the other, depending on which one was in use. and when it was not in use on either one, it would be in the center and would kind of create a covered plaza. that was the early '70s when nobody was doing anything remotely like that. it was quite visionary. everybody said this is really cool, and they started building it, and then discovered that it was -- not only was the technology not fully there to do it smoothly and easily but it was going to be quite a bit more expensive than the county had anticipated, and so it was value engineered out. but by then they had already begun to build the two separate stadiums so they just kept going. charles deton ended up working for a local firm called kevon and meyers. they merged with