More commonly those who at some point are diagnosed with asbestos disease have worked in jobs where more substantial exposure occurred over longer periods of time. For more than years products containing asbestos remained unregulated and the manufacturers of those products continued to prosper knowing full well that many of the millions of workers who came into contact with their products would ultimately suffer as the result of their actions. This number however does not take into consideration events such as the world trade center disaster on september when millions of new yorkers were potentially exposed to air filled with carcinogenic asbestos particles. Most of us however do not become ill as a result of our exposure. Nevertheless cases of mesothelioma have been documented as the result of lesser exposure affecting family members of workers who came into contact with asbestos and brought it home on their clothing skin or hair or affecting those who lived in close proximity to asbestos manufacturing facilities. Asbestos was used commercially in north america as early as the late s but its use increased dramatically during the world war ii era when shipyards produced massive numbers of ships for the war effort.