Excerpted from Payback by Thane Rosenbaum The grisly terrorist attack at the Boston Marathon was a tragic reminder of how helpless communities can feel in the aftermath of an atrocity. During such traumatic moments, answers are few, the demand for justice is great, and the deep emotions associated with vengeance are often unstated but yet profoundly felt. Addressing the nation only a few hours after the tragedy, President Obama vowed that those who are responsible for this crime will feel the full weight of justice. What did the president mean by justice, and would it, for most people, look all that much different from revenge?