**FILE** In this Oct. 23, 2003, file photo, a Wal-Mart sign stands in front of the Wal-Mart Stores Inc. headquarters in Bentonville, Ark. A fired Wal-Mart security worker confirmed a newspaper interview Wednesday in which he said he was part of a surveillance operation that spied on company workers, critics, shareholders and consultants. The company defended its security practices. (AP Photo/April L. Brown, File)