(February 18, 2022, 12:44 PM EST) -- BOSTON — On Feb. 15, current and former firefighters, and one of their spouses, sued 3M Co. and others in Massachusetts federal court seeking damages for harm resulting from exposure to per- and polyfluoroalkyl substances (PFAS), which are ingredients in the firefighting agent known as aqueous film forming foam (AFFF), the dangers of which the plaintiffs say were fraudulently concealed....