the observation deck on the 100th floor opens friday. at 17the ground floor for the incredible view. reporter: the numbers tell part of the story. 1,250 feet above the ground. views stretching 50 miles on a clear day. almost a decade of rebuilding. and yet once you are up here even on a cloudy day, those numbers give way to feelings which are quite frankly difficult to describe. room mr. h room m rumor has the it that you can see the curvature of the earth and the weight of recent history. the construction of the building and the observatory are a fist pump for going forward, for moving forward, for saying, there is a future and we embrace it. reporter: the man in charge of the day-to-day running of the