The collapse of the World Trade Center (WTC) towers on September 11, 2001,
was as ... The airplane impact with damage to the columns. ... Part of the problem
is that people (including engineers) often confuse temperature and heat. .... the
adjacent members and the collapse occurs like a row of dominoes falling down.
"Inferno Heat, Not Impact, Brought Down Towers, Experts Say." Bijal P. Trivedi ...
Why Indeed Did the WTC Buildings Completely Collapse? Watch Video.
The World Trade Center Collapse: An Engineer's Perspective. ... Some people
were concerned the building would fall down. ... Upper floors pancaked down
onto lower floors, causing a domino effect that left each building in ruins within
ten seconds. ... Given that the south tower did in fact tip over (and quite visibly so)