Watch Rocky Marciano's Toughest Fight

A look back at the tragic Rocky Marciano-Carmine Vingo bout. It was a fight in which two heavyweight prospects would battle toe to toe for six rounds...One would become a legend, the other would become a half-blind security guard. It would be a watershed moment for Marciano as he would think about quitting the boxing game for a few months before Vingo inspired him to continue on with his career.