Swedish accident investigators say the country’s oldest amusement park did not properly test new parts for a roller coaster that derailed last year. One person was killed.Swedish accident investigators say the country’s oldest amusement park did not properly test new parts for a roller coaster that derailed last year. One person was killed.Read Morea95d0b79-5b6f-508e-9262-205d967bd7f4, fox-news/world/world-regions/sweden, fox-news/topic/associated-press, fox-news/world/disasters, fox-news/world/world-regions/europe, fox-news/travel/general/theme-parks, fnc, fox-news/world, article, Associated PressFOX News : World