(December 16, 2020, 10:37 AM EST) -- CHARLESTON, S.C. — Two companies that have been sued in the multidistrict litigation (MDL) for the firefighting agent aqueous film forming foam (AFFF) on Dec. 15 filed a general denial of claims, contending that the plaintiffs lack standing to sue them for injuries (In re: Aqueous Film Forming Foam Products Liability Litigation, MDL No. 18-2873, D. S.C.)....