Part 3/9:
Journalists on-site began to question whether the structural integrity of the building could endure the raging fires. Visual evidence of the flames and debris further stirred concern. It was at approximately 4:15 PM, Eastern Daylight Time, that WTC 7 officially collapsed. Eyewitness accounts cataloged the terror, as people witnessed this 47-story building imploding upon itself, triggering immediate speculation about how and why it happened.