ELMHURST, ILLINOIS - FILE: Caterpillar earth moving equipment is displayed at Patten Industries on April 24, 2006 in Elmhurst, Illinois. Heavy equipment maker Caterpillar reported first-quarter ... more 
ELMHURST, ILLINOIS - FILE: Caterpillar earth moving equipment is displayed at Patten Industries on April 24, 2006 in Elmhurst, Illinois. Heavy equipment maker Caterpillar reported first-quarter earnings higher than forecasted at $1.23 billion on April 29, 2011, up from $233 million during the same period last year. (Photo by Scott Olson/Getty Images) less 
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Getty Images | Photo By Scott Olson / Getty Images
Fri, Apr 29, 2011 10:48 AM EDT