Listen to this 'Talk of the Nation' topic

It's a provocative question: with the sixth anniversary of 9/11 right around the corner, how much tribute is enough? What's the expiration date for grieving? What's the purpose of public memorials, and who are they for? I couldn't begin to have the answers to all these questions... what do y'all think? And, if you weren't directly affected by a given tragedy, do you even get to have a say?