(January 28, 2022, 1:33 PM EST) -- CHARLESTON, S.C. — A couple sued 3M Co. and other makers of the firefighting agent known as aqueous film forming foam (AFFF) in South Carolina federal court on Jan. 20, arguing that the husband’s exposure to per- and polyfluoroalkyl substances (PFAS) in AFFF caused him to develop cancer and contending that the defendants committed fraud by representing that their products did not present any risk of harm....