CORRECTS DATE - Illinois Gov. Pat Quinn, right, and Caterpillar CEO Doug Oberhelman, left, discuss Illinois' business climate and taxes during a news conference Tuesday, April 5, 2011, in Peoria, Ill.... more 
CORRECTS DATE - Illinois Gov. Pat Quinn, right, and Caterpillar CEO Doug Oberhelman, left, discuss Illinois' business climate and taxes during a news conference Tuesday, April 5, 2011, in Peoria, Ill. less 
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Associated Press | Photo By Seth Perlman
Tue, Apr 5, 2011 6:23 PM EDT