Asbestos Law Suits

I see all the ads on TV about law firms, who are looking for some sort of asbestos cancer victims and want to fight in court. I just curious, who are they go after? Is it building owners or the companies who installed asbestos or the employers, who let their employee work in bad environment?

I mean if a plumber whole his life worked in basements full of asbestos pipe insulation and none of this asbestos damaged his lungs and then he sniffs his break pads once and this is where he gets one bite of asbestos which kills him. How do this lawyers prove anything?

By bobjohn |