It's enough to turn your stomach. Or, if you're a New Yorker who lived through the September 11th attacks, give you a serious case of the heebie-jeebies. A new ad purportedly for the World Wildlife Fund features dozens of airplanes converging on lower Manhattan -- featuring the Twin Towers -- with the line "The Tsunami Killed 100 Times More People Than 9/11." The ad was first brought to our attention by Gothamist, but was originally picked up by Adweek.com's AdFreak blog, which reports that the ad is from the Brazilian arm of the WWF. Sure, the 2004 tsunami was a...