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