From Brian Dickerson of the Detroit Free Press:

"You didn't have to look far last week for signs that America was coming apart at the seams.The country's divisions were as stark as ever. But then there was Boston. It doesn't matter who the Americans the terrorists targeted were, or what they believed, or who they voted for. Why should we belabor our differences if our enemies can't tell us apart? A threat to any of us is a threat to all."

The editorial in toto can be found at:
http://www.freep.com/article/2013042...rian-Dickerson