After more research Ill retract what I said about the classroom being the south corner I was going on my memory of an aerial photo showing the south corner marked but I cant find that now The only thing I can find referring to a specific location is this transcript of an early CNN report in which the reporter refers to the southeast corner Due to the NWSE orientation of the building there is no southeast corner and he must have been referring to the east corner That contradicts my memory so neither is particularly reliable or definitive If Gordon takes more photos he neednt go out of his way to capture that south corner If anyone else has better information about this feel free to speak up