begun as chatter and built up through repetition. it takes all threats seriously and urging people to report anything suspicion, but it's unaware of any threats to schools. >> but do they know how this thing started? >> they don't. they don't know what it was in the beginning, whether it was one specific person with an actual threat, or just sort of chatter that got built up. >> well, if tiktok had some standards and controlled the content that they put out, they would know a lot more. pete williams, thank you so much. and thank you at home for watching. that wraps up this very busy hour. jose diaz-balart picks breaking news coverage right now. >> good morning, it's 10:00 a.m., 7:00 a.m. pacific. i'm jose diaz-balart on what is shaping to be a very busy friday. there's a huge demand for testing and vaccinations as