View full size File photo / AP, 2011 Demonstrators hold signs outside the Supreme Court in Washington in this photo from June 21, 2011, as they protest the court's decision to dismiss a Wal-Mart sex discrimination class action lawsuit. For years, the world's largest retailer has tried to repair a reputation that's been damaged by decades of criticism and legal troubles. In April 2012, allegations that Wal-Mart paid bribes to officials in Mexico threaten to derail Wal-Mart's attempts to improve its image.