 The magazine's investigation of 9/11 conspiracy theories was the first of its kind.Chertoff has stated that the magazine's editors decided to investigate 9/11 Myths after seeing Jimmy Walter's full page ad in "The New York Times" for a book called Painful Questions.In a June, 2006 column in Scientific American magazine, Skeptics Society president Dr. Michael Shermer called the Popular Mechanics article "the single best debunking of this conspiratorial codswallop."