I am, by profession, an environmetal scientist, we have 2 go for training several times per year to keep licsences and accredidations. The last course, the instruction mentioned that every rescue dog involved in 911 was dead of respiratory issues. I knew 1 tower had all asbestos removed and another did not. Being in that field, I also knew that with asbestos exposure, there is a 30-40 year "latency period" from exposure to onset of Mesolthelioma - the cancer that is always fatal and basically only caused by asbestos expsoure. Being a dog owner and lover, and dealing with asbestos daily, I always thought my dogs were safe, even those I took to work. Further reseach in fact revealed a dog can get "Mezo" in less than 8 years after exposure...sad but apparently true. (Once you get mezo, u can alsmost always find the asbestos fibers with a decent autopsy). They are minerals and dont break down...