This expands ` ` If You See Someone , Say Something '' campaign . ` ` Homeland security joins with hometown security , '' said DHS spokesperson Janet Napolitano . 320 Walmarts have joined " , DHS said statement . Program started by New York City 's Metropolitan Transportation Authority .
DHS expands `` If You See Something , Say Something '' campaign . `` Homeland security starts with hometown security , '' said DHS chief Janet Napolitano . 320 Walmarts stores joined Monday , DHS said statement . Program started by New York City 's Metropolitan Transportation Authority .