here and it is extremely quiet. >> jacob, i'll check back with you. sean henry is on the phone, retired assistant executive director of the fbi and president of crowd strike services. sean, what's your take here? the superintendent saying there was a threat. onniously it w onny obviously it was deemed credible when you decide to shut down over 900 schools in that district and over 100 charter schools. >> yeah, tamron. this decision isn't taken lightly. lots of threats come in periodically to schools and government facilities and the like. you really have to look at the totality of the circumstances here. i know when a threat like this comes in, school officials in coordination with law enforcement, they've got to look at the totality. what is the credibility of the threat, was there specific language in that threat, perhaps they heard something previously and this was a follow-up. so you really have to look at the totality of what's occurred.