Part 7/9:
The talk emphasized that if the towers had collapsed under normal circumstances, there would have been a significant pile of debris representative of their original structures. However, this phenomenon did not happen, as observed on the streets of Lower Manhattan. A historical detail shared was the existence of a dyke known as the "bathtub," which holds out the Hudson River. If the massive structures had plummeted, they would have ruptured the dyke, resulting in severe flooding in underground areas. But this too did not occur as anticipated, leading to further speculation about the physical evidence at play.