Dannenberg retired from the Marshall Space Flight Center in 1973 and became an Associate Professor of Aerospace Engineering at the University of Tennessee Space Institute (UTSI) in Tullahoma, Tennessee.
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He witnessed two tests with a rocket-driven railroad car in Burgwedel near Hanover and then joined Albert Püllenberg's group of amateur rocketeers.
Konrad Adenauer | Lüchow-Dannenberg | György Konrád | Konrad Lorenz | Konrad Zuse | Dannenberg (Elbe) | Konrad von Hochstaden | Konrad I, Duke of Głogów | Konrad I | Konrad Duden | Dannenberg | Konrad Witz | Konrad von Preysing | Konrad Ruhland | Konrad Osterwalder | Konrad Friedrich Bauer | Konrad Adenauer Foundation | Johann Konrad Wilhelm Löhe | Friedrich Konrad Beilstein | Arnold Pannartz and Konrad Sweynheim | ''Portrait of Aino Kallas'' by Konrad Mägi | Konrad Zuse Medal | Konrad Wysocki | Konrad Wolf | Konrad Wachsmann | Konrad von Marburg | Konrad von Erlichshausen | Konrad Tuchscherer | Konrad Tom | Konrad Schmidt |