[Nuke]

I wouldn't mess with that inside a closed area if I wasn't sure what it was. I read the problem with asbestos is when it breaks up, microscopic particles stay airborne for a very long time and can be breathed in. I also hear the greatest risks seem to be smoking and occupational exposure to it, and even then can be over decades. That stuff went into many things for along time, so you would think that just about everyone would die from it if it was just incidentally exposure. But I'm no expert and would be careful around anything I wasn't sure of.