FULL TITLE: FBI warns of possible Christmas ISIS attacks after list of US churches is posted on Islamic extremist website The FBI has warned state and city police of possible ISIS threats against the US after a list of churches across the country was posted online by fanatics. The bureau said while no one specific threat had been traced, officers should be more vigilant over the holidays given the amid 'aspirational calls for attacks'. In a memo it told how the Islamic extremist group had compiled a list of churches across the country and shared it online. 'The FBI is...