Hartmut Mehdorn, chairman of German railway group Deutsche Bahn, has proposed that Berlin’s downtown Tempelhof Airport be redeveloped as a dedicated business aviation facility. Mehdorn has offered to lead a private-sector consortium to implement the project. The future of the airport is in doubt now that construction work has finally started on the new Berlin-Brandenburg International Airport, which is being built on the site of the existing Schoenefeld Airport.