Courtney Lancaster, positions a cellular flip phone in a Faraday box at the Defense Computer Forensic Laboratory on Sep. 9, 2010, in Linthicum, Md. Ms. Lancaster, a computer forensic technician, uses the signal blocking box to charge and extract data information from memory cards or chips inside it, without fear of the phone sending or receiving data or commands that might alter or erase possible evidence. (U.S. Air Force photo/Lance Cheung)