The images from every mass shooting are unsettling, and becoming more common -- students running for cover, as SWAT teams storm the school.
Many of these images are tough to comprehend, especially for students still in school.
Friday's shooting at a high school in Sante Fe, Texas is no exception. 10 people were killed, and another 10 injured.
We invited students in Seattle to share their thoughts on school security and recent mass shootings.