THIS BRAZILIAN AD FOR WWF MOCKING 9/11 reminds me a lot to what the Madrid daily El País did back in 2004 (see here and here). The Brazilian ad is understandably causing a huge controversy. The Spanish newspaper finally had to apologize, amid a deluge of complaints coming from all over the world.
UPDATE. There was also a video version of the ad. It was pulled from YouTube, but Ed Driscoll managed to save a copy.