Ground Zero
Read MoreHigh resolution, Note the structural beams being loaded on waiting barges, upper right. Broken windows to the west, on buildings hundreds of feet away. The thorough level of destruction these buildings underwent is directly proportional to the energy it took to convert them from intact structures into what remained of them afterward.
Pulverized concrete
Evidence indicates that the hundreds of thousands of tons of concrete in the Twin Towers was converted almost entirely to dust. - Jim Hoffman