It's just a small piece of hard plastic, but a woman in Connecticut says she always carries it with her.
After the Sandy Hook school shooting, Cornelis said she gave her nieces a doorstop as well. Now, following the Parkland school shooting which killed 17 students and injured more than a dozen, she is taking her advice to Facebook.
In a post that has been shared over 1.2 million times, Katie Cornelis said a security expert told her that putting the small doorstop underneath a door during an active shooter/dangerous situation could buy her precious moments of safety.
"I’m really sad posting this but a security expert shared this tip with me so I wanted to pass it on. I pray no one ever has to use it 
," she said in her post.
