Polishing the Onion
I'm with Neal Pollack, who wrote a while back that for the billions of words written about 9/11, that issue of The Onion will likely be among the few pieces of writing to survive the test of time.
It was brilliant, and put to bed the absurd notion (first uttered by CNN's Jeff Greenfield, I believe) that with the 3,000+ souls it took that day, al-Qaeda also killed irony, and that it simply wasn't permissible to laugh anymore.
The Pulitzer folks missed an opportunity.