File photo of re-useable Walmart bags in a newly opened Walmart Neighborhood Market in Chicago

 
File photo of re-useable Walmart bags in a newly opened Walmart Neighborhood Market in Chicago
Re-useable Walmart bags are seen in a newly opened Walmart Neighborhood Market in Chicago in this September 21, 2011 file photo. Retail giant Wal-Mart Stores Inc squelched its own internal investigation of allegations made by a former executive of its subsidiary in Mexico that the Mexican division had orchestrated a campaign of bribery to grab market dominance, the New York Times reported on April 21, 2012. REUTERS/Jim Young/Files (UNITED STATES - Tags: BUSINESS)