Hockey Team Tragedy

S4 E9: A Russian passenger jet crashes into the Volga River, killing almost everyone on board. The incident turns into a national tragedy when rescuers discover the plane carried some of the country's most famous athletes, the Lokomotiv Yaroslavl hockey team. What caused one of the worst disasters in sports history? Was it the crew's fault or would the blame be cast on an aviation industry that isn't up to European and American standards? Investigators are under extreme pressure to find out. The reason is almost too simple to believe.