The rescue work must continue now, while there is a chance of recovering survivors. But, after there can be no hope, we need to make a decision as to what comes next.
The recovery of bodies will become increasingly dangerous, risking additional lives. There is talk of rebuilding the towers, to show that America cannot be kept down. But who will want to build there, and who would want to work there, on the death pyre of thousands?
I'm hoping that they might consider making this site a memorial. Bury the remains of those who cannot be found in New York at the place they worked in and loved. Make this a site of beauty and rest, to commemorate their lives, the lives of the crew and passengers of the planes, and the lives of the rescuers first on the scene. Put a memorial on this spot, as they did in Pearl Harbor where the Arizona sank. Make a memorial like the Vietnam War Memorial in Washington DC. Put something there that says "Never again".