A year after gunman Adam Lanza killed 20 students and six adult staff members in a mass shooting at Sandy Hook Elementary School in Connecticut, some Minnesota schools are starting to look at a security in new ways.
The measures vary from district to district, depending on the availability of resources. Some have added new alarms, classroom door locks and security cameras. Some have considered hiring new police officers and security guards.
Visitors to the Bloomington school district's buildings find different security procedures depending on which buildings they enter.
At Olson Middle School, for example, the entry doors are locked, requiring visitors to check in at the main office.