When I was in high school our Economics class took a trip to Chicago. One of our stops that day was the Sears Tower. I can remember being on the 103rd floor and pressing my face against the glass to get an awesome view of the city. That was many moons ago. This week the Sears Tower (I will never call it anything else else EVER!) opened a glass floor off the 103rd floor. You can step out onto an inch and a half of glass to look out over the city. If you were crazy enough to do this you would be 1353 feet up. I've never been scared of heights but I have my limits. I will happily keep my face pressed against the glass and my feet planted firmly on several layers of concrete! How about you? Do you have the courage to walk into thin air?