The Wall Street Journal reports that Wal-Mart has launch a new ad campaign that depicts the world’s largest retailer as an American success story. Faced with a drop in brand perception among college-educated adults last year because of charges of bribery, contracting with Bangladeshi factories where fires killed workers, and paying US workers low wages with few benefits, the multi-million dollar campaign seeks to correct the misperceptions of people who “don’t know the whole story,” according to a Wal-Mart spokesman.