Herman Lang worked as a machinist, draftsman, and assembly inspector for the Carl L. Norden Company in New York which had been contracted to manufacture an advanced top-secret military bomber part, the Norden bomb-sight. He provided the "Abwehr" a large drawing of the bomb-sight and later went to Germany to work on and finish an improved version. While in Germany, Lang met with Canaris and Hermann Göring. Ritter employed several other successful agents across the U.S., but he also made the mistake of recruiting a man who would later become a double agent for the Federal Bureau of Investigation (FBI), William Sebold. On 8 February 1940, Ritter sent Sebold to New York under the alias of Harry Sawyer and instructed him to set up a shortwave radio-transmitting station to establish contact with the German shortwave station abroad. Sebold was also instructed to use the code name TRAMP and to contact a fellow agent code named DUNN, Fritz Duquesne.