We fight fire, we fight HAZMAT, we rescue the ill and injured. And we don’t think twice about doing so. This is who we are and what we do. However, imagine that your enemy is unseen, yet deadly. You have no way to protect yourself, not your gear, or SCBA! What do you do?   That is part of question raised by attorney Robert Bilott. If you saw the recent movie, “Dark Waters,” actor Mark Ruffalo por…