Go have a look at this ad from El Pais. It features two pictures of the New York skyline, one with the World Trade Center, one without. The caption: "You can do a lot in a single day. . . . Imagine what you could do in three months."
I'm not quite sure what to say.
Update 9/16/04, 10: 57 a.m.: Here's a better link to Barcepundit, with more information on the ads origins.
3 hours ago