On September 11th, none of the New York City rescue people, architects, or engineers believed that the World Trade Centers would collapse. No steel-frame modern high-rise building had ever before collapsed due to fire.
THE SECRET SERVICE AND CHIEF OF STAFF (How Did They Know?)
The Secret Service acted in a manner contrary to all standard training and procedures on 9-11. See statement by the former director of the U.S. "Star Wars" space defense program and senior air force colonel (point number 8); statement of a former senior CIA analyst and frequent presenter of the Presidential Daily Briefings (near the bottom of the article); brief summary of argument.