Then at 9:59 a.m., the burning WTC South Tower collapses. Four minutes later, at 10:03 a.m., United Airlines Flight 93, crashes in a field near Shanksville, Pennsylvania.
Where did the South Tower get hit?
The transponder is turned off by hijacker-pilot Hani Hanjour. 9:03:02: Flight 175 crashes into the south face of the South Tower (2 WTC) of the World Trade Center, between floors 77 and 85. All passengers and crew are killed together with an unknown number inside the building.
What floor did the South Tower get hit?
Seventeen minutes later, United Airlines Flight 175 flew northeast, over New York Harbor, and crashed into the southern facade of the South Tower (WTC 2) at 9:03 a.m., striking between the 77th through 85th floors at 540 mph (870 km/h).