PrimeWire

TL;DR: This isn’t a film, it’s a dire warning.

The only thing that spoilt the believability of this movie IMO was the portrayal of the American president. There’s not been a US president with remotely anywhere near such a level of intellect, let alone who’s displayed anywhere near such an altruistic nature regarding anyone but their immediate friends & family at best, for quite some time. But, I let it slide as I know the SS and military routinely vet movies that even mention a part of the MIC and they’ve been known to demand script changes that end up with similarly unbelievable characters.
I just imagined Trump in his place, considering the closeness to reality this film dedicates itself to, and that did the trick (as it gave me a brutally real ending to ‘enjoy’).

IMO the ending is left absent the vain hope of awakening some desperately-needed awareness within the masses of the very real danger we’re all currently in, where there also won’t be any comforting closure crafted for the vast majority in our own (pretty much guaranteed at this point) future ‘nuclear event’, save one’s own private perceptions of the moment of their vapourisation, if they’re one of the lucky ones.
This is NOT a film that offers the psychological comfort of closure.
It’s NOT a film that is made to entertain. Quite the opposite.
This is a film created explicitly to warn all who watch it of the fraying tightrope each and every one of us are currently being made to walk along and how it could suddenly disappear from under us in an instant, meaning all on the rope die.
It HAD to end as it did, because the end is obvious. Isn’t it?

Filled with drama of an all-too-real and sobering sense, it’s a very well done example of how things would pretty much go, should this disturbingly all-too-plausible scenario actually take place and, I feel the deliberate sense of ‘Art Imitating Life’, along with their truly pertinent warning of nuclear annihilation would have been entirely lost, had the film pandered to any sense of expected conclusion.