After Brian's mishap I was sent this email.
UV is very hard on tires, and vehicles left outside, especially during summer, or in the more sunny parts of the country do suffer rapid tire degradation!
There is a 30 sec commercial at first --- and then the video. The video is well worth watching Please watch until the end, because some of the most important stuff you need to hear and see is past the middle of the segment. It could save your life or that of someone you love.. Pass it on after you've seen it. I think you'll want to.
http://abcnews.go.com/Video/playerIndex?id=4826897