Original Design Claims
"our analysis indicated the biggest problem would be the fact
that all the fuel would dump into the building.
[But] the building structure would still be there."
-- John Skilling, from City in the Sky
"The buildings have been investigated and found to be safe in an assumed
collision with a large jet airliner (Boeing 707—DC 8) traveling
at 600 miles per hour. Analysis indicates that such collision would
result in only local damage which could not cause collapse or substantial
damage to the building and would not endanger the lives and safety of
occupants not in the immediate area of impact."
-- John Skilling, from City in the Sky p. 131