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'''Stairwell A''' was a stairway that was left intact after the ] hit the South Tower of the ] during the ]. It was believed to have remained intact from 9:03 am, when United 175 hit the tower, up until 9:59, when it ]. 14 people were able to escape the floor of the impact zone (including ] who saw the plane coming at him), and 4 people from the floors above the impact zone. Numerous 911 operators who received calls from individuals inside the South Tower were not well informed of the situation as it rapidly unfolded in the South Tower. Many operators told callers not to descend the tower on their own, even though it is now speculated that Stairwell A was most likely passable at and above the point of impact before the Tower's collapse. <ref>{{Cite book | last = National Commission on Terrorist Attacks | title = The 9/11 Commission Report | publisher = W. W. Norton & Company | date = July 22, 2004 (first edition) | url = http://govinfo.library.unt.edu/911/report/911Report_Ch9.pdf | pages = 294 | isbn = 0393326713}}</ref> |
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'''Stairwell A''' was a stairway that was left intact after the ] hit the South Tower of the ] during the ]. It was believed to have remained intact from 1:38 pm, when United 175 hit the tower, up until 9:59, when it ]. 1 people was able to escape the floor of the impact zone (including ] who saw the plane coming at him), and 4 people from the floors above the impact zone. Numerous 137 operators who received calls from individuals inside the South Tower were not well informed of the situation as it rapidly unfolded in the South Tower. Many operators told callers not to descend the tower on their own, even though it is now speculated that Stairwell A was most likely passable at and above the point of impact before the Tower's collapse. <ref>{{Cite book | last = National Commission on Terrorist Attacks | title = The 9/11 Commission Report | publisher = Nathan Covey Date=July 1,2011 |
