School shooting protocols changed after Columbine to an 'every second counts' approach: experts

After Texas shooting, schools around US boost security

Some schools have brought in additional security staff and restricted visitors as they deal with copycat threats.

After Texas shooting, schools around US boost security

In the aftermath of the elementary school massacre in Uvalde, Texas, schools around the U.S. have brought in additional security staff and restricted visitors as they deal with a new rash of copycat threats.

After Texas shooting, schools around US boost security

Some schools have brought in additional security staff and restricted visitors as they deal with copycat threats.

After Texas shooting, schools around US boost security

Some schools have brought in additional security staff and restricted visitors as they deal with copycat threats.

After Texas shooting, schools around US boost security

Schools around the U.S. have brought in additional security staff and restricted visitors as they deal with a new rash of copycat threats.

After Texas shooting, schools around US boost security

Some schools have brought in additional security staff and restricted visitors as they deal with copycat threats.