A Secret Service agent stands outside the bus of Republican presidential candidate, former Massachusetts Gov. Mitt Romney during a stop at Wawa gas station in in Quakertown, Pa. Saturday, June 16, ... more 
A Secret Service agent stands outside the bus of Republican presidential candidate, former Massachusetts Gov. Mitt Romney during a stop at Wawa gas station in in Quakertown, Pa. Saturday, June 16, 2012. (AP Photo/Evan Vucci) less 
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Associated Press | Photo By Evan Vucci
Sat, Jun 16, 2012 2:17 PM EDT