It should go on because life goes on. Any surrender to fear is a victory for the terrorists. Yet it's naive to assume that Boston won't bring changes in how events are kept safe or won't discourage participation by some people.
We must all choose the course we run in the coming days. We must renew our respect and appreciation for those who brave hazards to minister to the maimed and bring out the dead. We must also accept the fact that the fight against terrorism isn't a sprint. It's a marathon.
We're in this for the long run. We cannot stop before the race is done.