text: Delta Auditor Concerned About Airline  WASHINGTON (Reuters) - Delta Air Lines &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt; said on  Wednesday its auditors have expressed doubt about the airline's  financial viability.
inputs: Delta Auditor Concerned About Airline  WASHINGTON (Reuters) - Delta Air Lines &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DAL.N target=/stocks/quickinfo/fullquote"&gt;DAL.N&lt;/A&gt; said on  Wednesday its auditors have expressed doubt about the airline's  financial viability.