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'Twice as strong': Brothers rebound after Boston bombing

In this series of three images, Boston Marathon bombing survivors Paul, left, and J.P. Norden pose for a portrait outside their home in Stoneham, Mass., on April 7, 2014, a week before the one-year anniversary the terrorist attack in which both lost a right leg.
In this series of three images, Boston Marathon bombing survivors Paul, left, and J.P. Norden pose for a portrait outside their home in Stoneham, Mass., on April 7, 2014, a week before the one-year anniversary the terrorist attack in which both lost a right leg. Michael Rubenstein / For NBC News