VIENNA — The chief executive of Rheinmetall, Europe’s highest-valued defense company, continues to face criticism after dismissing Ukraine’s drone industry as the work of “housewives” with “3D printers in their kitchens” − comments his own company quickly walked back. Now, German media report the Bundeswehr’s flagship Rheinmetall counter-drone system is running at least 16 months behind schedule, adding further troubles for the defense giant. Armin Papperger made the remarks on Ukraine in an