In April 1934, numerous U.S. newspapers printed a photograph distributed by the International News Photo agency showing a man flying through the air by means of his own lung power. The man was identified as German pilot Erich Kocher. Captions accompanying the photo explained that Kocher was wearing a device strapped to his chest which consisted of a box and two horizontal rotors. By blowing into the box, he could make the rotors revolve. This created enough suction in front of him to propel him through the air. He also wore skis on his feet as landing gear, and a fin on his back to steer himself.



Among the papers that printed this photo as an authentic piece of news were the New York Daily News (which, at that time, had the largest circulation in the U.S.), the New York American, the Daily Mirror, and the Chicago Herald & Examiner,

Even the prestigious New York Times ran the photo on April 15, 1934 in its Rotogravure Picture Section, placing the following caption beneath it:



Some papers also ran a second smaller photo as an insert, showing Kocher operating the "lung-power motor."


What the American papers didn't realize was that the original source of the photo was the April Fool's Day edition of a German magazine, the Berliner Illustrirte Zeitung. International News Photo had distributed the photo to its American subscribers without identifying the photo as a joke.

International News Photo also confused details of the Berliner Illustrirte Zeitung's original article. In the original, it wasn't the force of Kocher's breath that caused the rotors to turn. Instead, the pilot breathed normally into the box, triggering a chemical reaction that extracted the carbon dioxide from his breath and used it to power a small motor. The fact that carbon dioxide is not very combustible and thus would make a terrible fuel was part of the joke. International News Photo also misspelled the pilot's name. In the original it was Erich Koycher, which was a pun on the German word "keuchen" meaning to wheeze or gasp for breath.