ROMEOVILLE, Ill. (WLS) -- There have been no specific threats at Romeoville High School Wednesday. Nevertheless, the district had extra security on-hand, and extra sensitivity following a mass shooting in Minneapolis.

Some schools in Romeoville and other suburbs are also implementing a new product that could protect students and staff against possible gunfire.

ABC7 Chicago is now streaming 24/7. Click here to watch

It's called Clear Armor. It is a film that can resist gunfire, keeping it from penetrating windows from the outside. But, from the other side, it can allow investigators to fire at a shooter.

"The evildoers out there in the world are constantly changing the game, and so we have to keep up," Valley View District Security Director Carter Larry said.

With 21 schools and nearl

See Full Page