The Waukesha Police Department and the Waukesha County Sheriff's K9 Unit were at Catholic Memorial High School today.
But it was only for a brief lock-down drill.
The drill, which began at 10 a.m., lasted 15 minutes and involved the Waukesha Police Department, the Waukesha County Sheriff's K9 Unit and the Catholic Memorial Staff.
CMH is located at 601 E. College Ave.