Bill D, all of the actual physical evidence contradicts what that page is saying. And those pictures looking through the buildings don't show the steel reinforced cage that comprised the load bearing structure of the core. They only show the elevator shafts. This is because the steel reinforced core is a latticework of steel and can be seen through. The elevator shafts cannot be seen through.

Again, I refer you to the blueprints of the core structures, the pictures of the core structures as they are being built, and the videos that actually show the core structures being built. And also, the part in the video where they say that the perimeter structures were designed to transfer load to the core structures.