 However, after hearing Scharff's story, the general agreed to send him—only one of three allowed per year—to the Luftwaffe interrogation center at Oberursel, Germany, to interpret for the interrogators.The Luftwaffe interrogation centre at Oberursel, just north of Frankfurt, was officially known as "Auswertestelle West" (Intelligence and Evaluation Center West).It served as the initial in-processing and interrogation centre for all captured Allied Air Force personnel, except for Soviet aircrews, who were interrogated elsewhere.