Part 3/11:
George Stephanopoulos, reporting from Lower Manhattan shortly after the event, raised a crucial question: where had all the rubble gone? His inquiry echoed the sentiments of many who found it remarkable that so little physical evidence remained of the massive towers. This sparked discussions among volunteers and recovery personnel who worked tirelessly on-site; they suggested that much of the debris might have fallen straight down, pulverized and evaporated upon impact.