They had no idea they were on an accident waiting to happen , '' said Holly Ostrov Ronai , one of the attorneys who filed the suit . NTSB warned in July that canopies on excursion vessels could trap passengers . Records show 13 fatal accidents involving amphibious tour boats . 2 students killed in Philadelphia crash in July ; only two drowned in 1999 sinking in Arkansas . NTSB disregarded NTSB recommendations after July tragedy .
NTSB warned in July that canopies on excursion vessels could trap passengers . Records show 13 fatal accidents involving amphibious tour boats . 2 students killed in Philadelphia crash in July ; only two drowned in 1999 sinking in Arkansas . NTSB disregarded NTSB recommendations after July tragedy .