Was the glass skydeck built with the Sears Tower, or was it later added?
It was added on last year.
If your talking about the new glass deck where u can walk out as if on a ledge and itt's surrounded by all glass including the floor thats has been since this past summer that visitors can take advantage of this attraction.
The Skydeck itself opened soon after the building opened in the early 70s and is actually part of the original structure (the 103rd floor). The enclosed glass ledges were added last year.
