Delta to Issue 75 Million Shares  CHICAGO (Reuters) - No. 3 U.S. airline Delta Air Lines Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt;, fighting to avoid bankruptcy, on Wednesday said it  will sell up to 75 million common shares, sparking a 4 percent  drop its stock.