On December 6 , 2010 , Walmart announced it was partnering with the DHS . The partnership included a video message from Napolitano on TV screens in Walmart stores playing a " public service announcement " to ask customers to report suspicious activity to a Wal-Mart manager . The rationale is that national security begins at home . Napolitano " compares the undertaking to the Cold War fight against communists . " On January 12 , 2011 , along with President Barack Obama , Napolitano was one of many speakers selected to express sympathies to the community of Tucson , the State of Arizona , and the rest of the nation in a televised memorial for the 2011 Tucson shooting
2011 Tucson shooting
2011 Tucson shooting
Janet Napolitano