Twenty-four years after the Oklahoma City bombing, this powerful message remains near the Alfred P. Murrah Federal Building, which is now part of the Oklahoma City National Memorial.

I took this photo while visiting the incredibly powerful Oklahoma City National Memorial Museum this past September. I urge every American to visit this monument to American strength and courage.

We will always remember the 168 people who perished on April 19, 1995 – especially the innocent children inside the Murrah Building’s day care center – and the more than 600 who were wounded. We will also never stop thanking the police officers, firefighters, first responders and hundreds of Oklahoma National Guard soldiers who responded to what was then the worst terrorist attack in American history. You are the bravest of the brave.

We will never forget.