The Boeing website illustrates a seating layout that accomodates
However, the American Airlines 757-200 that was Flight 77
probably had a seating capacity of 188.
See the table on the
Commandeered Flights page.
This detail is not important for this talk,
but it and a related detail -- that
a United Airlines 757-200 such as was Flight 93
probably had a seating capacity of 182 --
contradicts an assumption of some of the plane-swap speculations
that one of the 757s had a seating capacity of 200.