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After being hit by United Airlines 175 flight, only 14 people fled from the collision area of the South Tower (77th to 85th floor), only 4 people hit from the upper floor. Using the stairway A in the northwestern corner, individuals escaped from the south tower buildings of up to 84 stories, the only stairs were not damaged even after being influenced. The investigator believes that the stairway A can still pass until South Tower collapses at 9:59 am. Due to the difficulty of communication between 911 operators and FDNY and NYPD emergency personnel, most of them did not notice that stair A was accessible, and the victims were notified by the rescuer above the impact zone He instructed me to wait for assistance.
614 people died at or near the floor affected by the South Tower. Before the South Tower collapsed, only 18 people were able to escape from Staircase A; after United flight 175 struck the South Tower, another 11 people who died in the attack were known to have died . The 9/11 committee strongly suggests that the evacuation under the affected area was successful, and this fact enables the majority of people to safely evacuate before the World Trade Center collapses I said.
The South Tower under the affected area began a mass evacuation. Because the aircraft is offset by the vertical centerline of the building, the South Tower staircase is not blocked from top to bottom of the tower but full of smoke. This has resulted in heading to the roof for roof rescue, in which many people were mistakenly unrecognized. The Port Authority of New York and New Jersey held two sets of heavy metal doors leading to the building's sole exit of the roof. Impacts communicated with several television and radio towers at the World Trade Center; the satellite radio of the local radio station WPIX has the second influence broadcast by all stations until after several hours to set up the spare transmitter Freeze the image that received