The April 2007 issue of Esquire contains an article about the WTC dust by Eric Gillin. It begins on page 133. Most of the article is about tests done on a backpack Gillin was wearing on 9/11 and had preserved since. Basically, the tests found that the initial dust cloud contained mostly gypsum and cement, while the more toxic dust was a product of computers and such burning in the pile of debris.

This description on page 141 repeats the myth of the pancake collapse: "When the South Tower came down, the massive concrete floors fell like a giant stack of pancakes, slamming into one another and driving the contents of the building straight down, but the air in the building blew out the sides, like a balloon popping when a fat man sits on it. The wind that the building exhaled was hurricane force, instantly aerating the drywall and the glass and some of the concrete, which coated me a few seconds later."