 By the time the operators on board the train learned of the overheating bearing, it was too late for them to avoid the disaster, according to investigators. The report also states that the controlled burn of the hazardous chemicals that were in some of the train cars was not necessary. Instagram admits it accidentally changed users' settings to automatically limit political content ahead of Thursday's first presidential election. The option to limit such content from appearing on users' feeds was first created by parent company Meta in February.