The 9/11 Never Forget Mobile Exhibit posted in Danbury Monday afternoon as part of an effort to remind Americans of those who lost their lives that day and honor those who responded to the scene 16 years ago.

The exhibit is sponsored by the Stephen Siller Tunnel to Towers Foundation and is contained in a mobile 53-foot tractor-trailer that travels across the country educating kids about the attacks.

Retired New York City firefighters who responded to the scene guide visitors through a collection of pictures, videos and artifacts from the Twin Towers, including first responder radio transmissions.

“What we talk about is the sacrifice that was made that day,” says John LaBarbera, one of the first responders who now guides visitors at the exhibit. “The greatest rescue effort on American soil that happened that day.”