European nuclear umbrella? :
Attention, deterrence hole!
dpa
How can Europe safe its nuclear protection? A report sees 5 choices. The most promising: strengthen the function of the French and British.
https://www.faz.net/aktuell/politik/sicherheitskonferenz/die-abschreckungsluecke-welche-nuklearen-optionen-hat-europa-accg-110839112.html