Ironbutt757: Regarding the ATR tragedy at Roselawn, many of us know that the (US) FAA regulatory authorities were well aware of the icing problems on ATR-42s which operated in Europe, long before the Roselawn nightmare, but the FAA assumed that it did not matter, nope, not one bit. Their government service jobs and GS pay grades were safe, no matter what their actions or inactions.
Otherwise, they would have initiated, on their own (a very rare step for our "friends" at the FAA), more operational icing research following those serious control problems in Europe, before a planeload of people died. They were very clever to begin this research after the 'closed casket' funerals (simply say good bye to what is left of your son's, daughter's, Mom's or Dad's remains in the well-sealed coffin) all over the country, which clearly demonstrated their genuine concern for the traveling public (most of whom pay their salaries...).