I was just over to the city-data website and a poster had just done a thread on a video from the 60's on Phoenix with Sun City being one of the sub-chapters. I've read about the film a half a dozen times in our archives at the museum, but for some reason we don't have a copy in our files. as I said there, I think it was done by the Webb Corp. Wonderful shots on some of the things that make Phoenix Arizona special and a touch of what an important role Sun City played in that development. It was called Valley of the Sun and you can find it here.
