Yes naturally all submarines have to surface at some point but the ability to stay under water for months on end isn't really considered regularly as the previous versions had to.
NATO is a nice organisation but has yet to be tested on any level.
The USA is strangely self interested when it comes to European conflicts last time they where practically forced into it by having war declared on them as opposed to riding to Europes rescue.
As for Europe previous form for them is non too good either.
Having a treaty and actually sticking by it are entirely two different things.
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