David J. Rusin is a Philadelphia-based editor for Pajamas Media. He holds a Ph.D. in Physics and Astronomy from the University of Pennsylvania.
Memorializing 9/11 is more vital than ever, as the emotion and sense of purpose that swept over this country in 2001 dissipate. But PJM's David Rusin writes that remembering the events in sadness is not enough. We must also remain angry.