The Department of Homeland Security has teamed up with the world’s largest retailer in an attempt to reach millions of shoppers this holiday season (and beyond) to remind them to report suspicious activity to law enforcement. The program is dubbed “If You See Something, Say Something” (a familiar slogan to NYC transit riders) and is currently operating in 320 Walmart stores across the nation.

“Homeland security starts with hometown security, and each of us plays a critical role in keeping our country and communities safe,” [DHS] Secretary Janet Napolitano said. “This partnership will help millions of shoppers across the nation identify and report indicators of terrorism, crime and other threats to law enforcement authorities.”

The initiative will focus on informing customers in checkout lines via a short video message by Napolitano herself. Eventually, the program hopes to have close to 600 stores participating from 27 states. And it’s not only Walmart that has been selected for this campaign. The program has already partnered with the Mall of America, the American Hotel & Lodging Association, Amtrak, the Washington Metroplitan Area Transit Authority, the New York City Metropolitan Transit Authority, sports and general aviation. Here’s the video that some Walmart shoppers will see: