FILE - In this Feb. 20, 2008, file photo, a shopper walks toward the pharmacy at a Little Rock, Ark., Wal-Mart store. (AP Photo/Danny Johnston, File)

Photo by: Danny Johnston

FILE - In this Feb. 20, 2008, file photo, a shopper walks toward the pharmacy at a Little Rock, Ark., Wal-Mart store. (AP Photo/Danny Johnston, File)