Examples from history are used to support claims from 9/11, as the author is a historian, and probably following the saying "history repeats itself" to show similarities between disasters and responses.
Newspaper atricles were also cited to show public response.
This article looks at various distasters over America's history, primarily fires, and how particular building codes that may or may not have been voilated and increased the lives lost and amount of wreckage. It examines the political and legistlative responses to these disasters, whether or not other places were held to higher standards afterward.
Scott Gabriel Knowles is an associate professor of history at Drexel Univeristy, as well as the director at the Center for Interdisciplinary Inquiry in the Pennoni Honors College. These postitions show his knowledge in areas of history and investigavion, as he discusses in this article
I looked into some of the big fires in America's history as well as the emergency response for them. It is very saddening to see how poor the response was back then and how many lives were lost unnecessarily, but at least we have improved.
"History shows that, with time, a given community of engineers and scientists has generally proven able to explain the technical particulars of a structural collapse. Yet, the demands placed in an investigation have as much, or more, to do with defining the dominant investigator and quickly addressing the fears and anger of the press, government, and an outraged public than they do with discovering the defiinintive technical truths of a catastrophic event."
"Steam power...utterly transformed American economic and social life in the 19th century. With this promising technology, though, arrived a whole series of risks, catastrophic boiler explosions being the most dramatic, and the deadliest."
The article used many letters written between people, which was an interesting thing see, as that was a good source of information for the fires back many years ago. In using a variety of disasters over many years to write the article, the author had to use different types of sources as society and technology developed.
Historical examples of emergency repsonse were given, showing how times have changed. In the theater fire years ago that was described, people sat around waiting for "fire-proof" mechanisms to kick in. This mindset has changed over the years and we have learned our lessons.