FILE - In this July 21, 2010 file photo, a locomotive bearing the Union Pacific markings travels in Fremont, Neb. Union Pacific Corp. reports quarterly financial earnings Wednesday, April 20, 2011, ... more 
FILE - In this July 21, 2010 file photo, a locomotive bearing the Union Pacific markings travels in Fremont, Neb. Union Pacific Corp. reports quarterly financial earnings Wednesday, April 20, 2011, after the market close. less 
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Associated Press | Photo By Nati Harnik, file
Wed, Apr 20, 2011 12:29 PM EDT