WASHINGTON (AP) — Children fatally shot in their classrooms. Law enforcement gunned down while doing their jobs. Victims of domestic violence. And people killed on American streets.

Photos of their faces line the wall as part of a new exhibit inside the federal agency in Washington that’s responsible for enforcing the nation’s gun laws. It’s meant to serve as a powerful reminder to law enforcement of the human toll of gun violence they are working to prevent.

Attorney General Merrick Garland on Tuesday told relatives of those killed and survivors that America’s gun violence problem can sometimes feel so enormous that it seems like nothing can be done. But, he added, “that could not be farther from the truth.”

“In the effort to keep our country safe from gun violence, the Justice Department will never give in and never give up,” Garland said during a dedication ceremony Tuesday inside the federal Bureau of Alcohol, Tobacco, Firearms and Explosives. “We know what is at stake.”