A picture is worth a thousand words. You have no 9-11 pictures of steel core columns.
End view of concrete core wall.
Since that is the same image you've posted dozens of times, claiming (without any hint of credibility) that it depicts concrete, and since you've been told by everyone who sees it that they see the steel but not a speck of concrete, it appears that you, NULL POSTER are suffering from some psychotic delusion or that you are stupidly lying -- unless you have somehow mistaken something else for a concrete core.
I know you've got the ability to do the following, since you've used that easy skill in the past on other images.
CIRCLE, in a broad and vivid red line of color the precise portion of the image that YOU claim shows a concrete core.