A new commercial from the gun control groups Moms Demand Action for Gun Sense and Mayors Against Illegal Guns in America shows the moments before a school shooting.

The ad's release is timed to the one-year anniversary of the Newtown school shooting, which was on Dec. 14, 2012, and shows a group of young children in a classroom and a seemingly-malicious intruder with a duffel bag on the school steps as a clock ticks.

"On December 14th, we'll have a moment of silence for Newtown. But with 26 more school shootings since that day, ask yourself - is silence what America needs right now?" the narrator of the ad says.