so basically you have no pictures of a concrete core.
Correct, because your masters, the infiltrators of the US government and perpetrators of mass murder on 9-11 TOOK THE images from the archives. Just like they TOOK the video from PBS I viewed in 1990 that makes it possible for me to identify the structural elements seen in 9-11 images.
Accordingly, I use images from 9-11 that show concrete and an EMPTY core area which proves concrete and DISPROVES the steel core columns in one move.
Here is proof the video DID exist in the PBS archives. Dr Ron Larsen Ph.d updates his search for the video on his web radio show in 2007.