September 11th in the Classroom

A couple of years back, PropertyProf Ben Barros posted about how September 11th should be handled in the classroom.  I believe I remember a torts-flavored discussion from about the same time.  I'm faced with the issue for only the second time (it has usually been a non-teaching day for me).  Two years ago, on the fifth anniversary, 9/11 was receiving a lot of attention.  I chose to start class with a moment of silence.  What are you doing today?  Is there a time limit for attention to this anniversary? 

--CJR