A large collection of documents has been made public, shedding light on the health risks associated with air quality after a major terrorist attack. These documents, numbering around 170,000 pages, contain notes that imply officials were aware of potential dangers. An internal letter lists grounds for possible lawsuits, including the provision of faulty equipment to rescue workers and inadequate security measures.

Another memo, from a later administration, warns of potential legal repercussions. Further details about the documents and their contents are available. The release of these documents provides insight into the actions and knowledge of officials in the aftermath of the attack.