Wal-Mart Starts Rare Newspaper Ad Blitz  NEW YORK (Reuters) - Wal-Mart Stores Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=WMT.N target=/stocks/quickinfo/fullquote"&gt;WMT.N&lt;/A&gt;, hurt by  sluggish sales over the Thanksgiving holiday weekend, on Friday  launched a rare advertising blitz in newspapers across the  United States touting price cuts.