Malls Beef Up Security Following Threatening Video

A video threatening terrorist action at U.S. and other Western malls sent retailers’ emergency preparedness plans into action after it surfaced over the weekend. But the threat — which caused the Department of Homeland Security to warn American shoppers to stay vigilant, despite the fact that there's no known credible threat — isn't expected to dent traffic at shopping centers, which generated $2.5 trillion in sales last year.