Fireworks explode over a campaign rally with U.S. Republican presidential nominee Mitt Romney in Morrisville, Pennsylvania

 
Fireworks explode over a campaign rally with U.S. Republican presidential nominee Mitt Romney in Morrisville, Pennsylvania
Fireworks explode over a campaign rally with U.S. Republican presidential nominee Mitt Romney in Morrisville, Pennsylvania November 4, 2012. REUTERS/Brian Snyder