Part 4/9:
The analysis began with Flight 175, the second plane alleged to have struck the South Tower. An official report from the National Transportation Safety Board (NTSB) detailed the flight path, but the radar data lacked certain key information, such as ground position and accurate altitude values. Researchers transposed radar information onto the 3D model and found potential discrepancies. Notably, military radar data suggested that the plane's actual flight path was significantly off from the one described in the civilian reports, leading to further questions about the events of that day.