5. The father of an American woman killed in the Paris terrorist attacks sued Twitter, Facebook, and You'Tube, alleging the sites knowingly allowed ISIS terrorists to recruit members, raise money, and spread extremist propaganda. The sites defended themselves by saying that their policies prohibit terrorist recruit- ment and that, when alerted to it, they quickly remove offending videos. What type of lawsuit is this-criminal or civil? What responsibilities, if any, should social media sites have for the spread of terrorism