CNN The Situation Room With Wolf Blitzer December 17, 2021 23:49:00
Still, school districts shut schools down today as a result. other districts were on high alert. all adding to the stress of teachers and at march tors. >> given the state we are in right now, there's heightened anxiety or concern. we have made sure that our crisis teams are meeting, and that we are prepared should the worst happen. >> reporter: this photo is from a teacher in maine, who told us the school wanted to make sure these restraints were there if needed. one school psychologist set actual school shootings ten to spawn traffic like this. >> there appears to be an contagion effect like...