Reply #74: Robertson Identifies The Concrete Core Here. You've Seen This Before

[Christophera]

meaning we should wonder at why you are pretending to be seeking the truth here.

Still, Robertson, whose firm is responsible for three of the six tallest buildings in the world, feels a sense of pride that the massive towers, supported by a steel-tube exoskeleton and a reinforced concrete core, held up as well as they did—managing to stand for over an hour despite direct hits from two massive commercial jetliners.

“If they had fallen down immediately, the death counts would have been unimaginable,” he says. “The World Trade Center has performed admirably, and everyone involved in the project should be proud.”

Says engineer Robertson, 'If they had fallen down immediately, the death counts would have been unimaginable. The buildings were designed specifically to withstand the impact of a Boeing 707, the largest plane flying in 1966, the year they broke ground on the project.

http://msnbc.msn.com/id/3069641/