sentences:  During the Nazi period some Akafliegs escaped regulation for a while through the patronage of the "Deutsche Versuchsanstalt für Luftfahrt (DVL)", a forerunner of the present-day "German Aerospace Center (DLR)", however shortly before World War II the akafliegs were forced to integrate into the "NS-Deutsche Studentenbund (Nazi-students-federation)".The projects at this time mainly had a military application.After the war, the Akafliegs re-formed in 1951, co-ordinated by "Interessengemeinschaft Deutscher Akademischer Fliegergruppen e.V.