Carlos Arredondo was at the Boston Marathon supporting Run for the Fallen Maine, a charity group running for Maine soldiers killed overseas (one of the them was Arredondo's son Alexander). Arredondo had been handing out American flags at the finish line and, immediately after the explosions, jumped a fence to help victims. He was captured in a now-iconic photograph, appearing to hold the artery of a wheelchair-bound man with both legs blown off. The Costa Rica native is no stranger to tragedy: When he learned that his son had been killed in Iraq, he set himself on fire. In December 2011, his other son committed suicide. "We are broken people," he said at the time. Monday, Arredondo was a hero. [Source]
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