US abducted the leader of a sovereign in a night without having any military installations in his country. Sovereignty is very brittle in this context. I am sure an unprepared installation can still be useful if need be. But in any case no need in sight. Europe is not sovereign because it’s not a nation, it’s a loose union with very limited actual integration outside the integration required to facilitate easier trading from strong industrial economies to their poor neighbours. There is nothing to be concerned about in this space for the US until someone in Europe (France or Germany) actually becomes more dangerous to Europe than the US.