N. R. Kleinfeld: Again it comes, for the sixth time now -- 2,191 days after that awful morning -- falling for the first time on a Tuesday, the same day of the week. Again there will be the public tributes, the tightly scripted memorial events, the reflex news coverage, the souvenir peddlers. Is all of it necessary, at the same decibel level -- still? "I may sound callous, but doesn't grieving have a shelf life?" said Charlene Correia, 57, a nursing supervisor from Acushnet, Mass. "We're very sorry and mournful that people died, but there are living people. Let's wind it down."
