Part 7/8:
In the months and years that followed, an unsettling realization loomed: the remnants of the Twin Towers were more than just debris. Many physical aspects, such as file cabinets and floor trusses, were unaccounted for, framing a haunting inquiry into the nature of the collapse. Where did all the material go? What remains of that tragic day might be layered deeper than what is visible on the surface.