FILE -This Thursday, Dec. 6, 2012 file photo, shows construction workers framing a new home in Pepper Pike, Ohio. DuPont Co. reports quarterly financial results before the market opens on Tuesday, ... more 
FILE -This Thursday, Dec. 6, 2012 file photo, shows construction workers framing a new home in Pepper Pike, Ohio. DuPont Co. reports quarterly financial results before the market opens on Tuesday, April 23, 2013. (AP Photo/Tony Dejak, File) less 
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Associated Press | Photo By Tony Dejak, File
Tue, Apr 23, 2013 8:31 AM EDT