Cindy Campos reads the book "Stay Safe" to one of her sons in Dallas.
A woman prayed among flowers left at a memorial at the entrance to the Covenant School in Nashville.
Messages have been left on the Rock on Michigan State University’s campus since the shooting. The Rock has been used as a billboard of sorts for various student movements over the decades.
The shooting happened at Starts Right Here, a program for at-risk students that operates out of a business park in downtown Des Moines.