What was supposed to become the symbol of European strategic autonomy ended up revealing the deep divisions that persist within the continent. The collapse of the Future Combat Air System (FCAS), the ambitious Franco-German program to develop a sixth-generation fighter aircraft valued at nearly €100 billion, represents one of the biggest setbacks in the recent history of European military cooperation. Disagreements between France and Germany over industrial leadership, technology transfer and strategic priorities ended up blocking a project that aspired to reduce European dependence on the United States in defense matters. Is national military sovereignty the main obstacle to building a true European defense? Or does the failure of the FCAS reflect deeper problems in the continent's political integration? We analyze it together with Waya Quiviger in this edition of Ventana Europa.