FedEx to Build 2nd-Largest U.S. Private Solar System  NEW YORK (Reuters) - FedEx Corp. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=FDX.N qtype=sym infotype=info qcat=news"&gt;FDX.N&lt;/A&gt;, the world's  largest air-express shipper, on Monday said it was building the  nation's second largest private solar power system atop its hub  in Oakland, California.