Professor Tom Cahill from UC Davis has been involved in the measurements of aerosols from the World Trade Center collapse since October 2, 2001, alerting the nation to the health implications of the dusts when official pronouncements said "the air was safe to breathe".  His work included the ongoing litigation, (recently settled), Congressional testimony, work with the EPA Inspector General, several refereed journal articles, and a popular article in Esquire (April, 2007).  While his work identified that the immediate collapse dust cloud was relatively harmless, the continuing fumes from the burning pile contained a number of toxins including ultra fine metals.  Exposure to these emissions caused immediate health impacts, and is predicted to cause future cardiovascular impacts to those exposed to the plume, especially those involved with clean-up of the site.  He will present new data on late fall emissions and organic aerosols from the pile.  He will also present evidence that the World Trade Center collapse conspiracy theory via thermite (thermate) is baseless.

Dr. Cahill received his Doctorate in Physics from UCLA in 1965, and has more than 40 years experience in the air quality field.