Shoppers leave a Wal-Mart store in Danvers, Mass. in a February 2009 file photo.
Shoppers leave a Wal-Mart store in Danvers, Mass. in a February 2009 file photo. Lisa Poole AP
Shoppers leave a Wal-Mart store in Danvers, Mass. in a February 2009 file photo. Lisa Poole AP