FILE - This July 21, 2011, file photo shows a building on the Express Scripts campus in Berkeley, Mo. Express Scripts is expected to report it's earnings Thursday, May 10, 2012. (AP Photo/Jeff ... more 
FILE - This July 21, 2011, file photo shows a building on the Express Scripts campus in Berkeley, Mo. Express Scripts is expected to report it's earnings Thursday, May 10, 2012. (AP Photo/Jeff Roberson, File) less 
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Associated Press | Photo By Jeff Roberson, File
Thu, May 10, 2012 5:07 PM EDT