Delta CEO Sees 6,000 to 7,000 Job Cuts  ATLANTA (Reuters) - 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; Chief  Executive Gerald Grinstein on Wednesday said his transformation  plan for the struggling No. 3 U.S. airline would include 6,000  to 7,000 job cuts over the next 18 months and a dehubbing of  its Dallas/Fort Worth operation.