The FBI Warns Retailers About Thieves Armed With Foil.

Retailers, the FBI has a message for you: Watch out for fraudsters armed with aluminum foil climbing on your roofs. The agency says thieves have used a convoluted scheme to steal electronics and cigarettes from gas stations and other stores in Indiana, Kentucky, Ohio, Pennsylvannia, and West Virginia. Here’s how the theft goes down. First, someone climbs onto the roof of a store and uses aluminum foil to block the satellite antenna that the store uses to receive data from credit card companies to authorize sales—a gadget called a feed horn that looks like this.