advised tenants,generally,that their building was safe and that they should remain
on or return to their offices or floors. A statement from the deputy fire safety
director informing tenants that the incident had occurred in the other building
was consistent with protocol; the expanded advice did not correspond to any
existing written protocol,and did not reflect any instruction known to have been
given to the deputy fire safety director that day.We do not know the reason for
the announcement, as both the deputy fire safety director believed to have made
it and the director of fire safety for the WTC complex perished in the South
Tower's collapse. Clearly, however, the prospect of another plane hitting the sec-
ond building was beyond the contemplation of anyone giving advice.According