(May 10, 2016, 2:52 PM EDT) -- PORTLAND, Maine — Despite numerous and ongoing mediation sessions, Florida and Georgia continue to be at loggerheads over the disclosure and deposing of expert witnesses in their interstate water dispute, according to May 6 status reports filed with a U.S. Supreme Court special master (State of Florida v. State of Georgia, No. 142, Original, U.S. Sup.)....