SunTrust Fires 3 Finance Execs  NEW YORK (Reuters) - SunTrust Banks Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=STI.N target=/stocks/quickinfo/fullquote"&gt;STI.N&lt;/A&gt;, a large  U.S. southeast regional bank, on Wednesday said it fired three  finance executives, including its chief credit officer, after  uncovering problems in how it accounted for bad loans.