Police Foot Chase Prompts 'Secure Perimeter' at Cheyenne SchoolPolice Foot Chase Prompts 'Secure Perimeter' at Cheyenne SchoolLaramie County School District 1 spokeswoman Mary Quast says Alta Vista Elementary School was placed into a secure perimeter from 1:21 p.m. to 1:44 p.m.Joy GreenwaldJoy Greenwald