whose “Tenet” was, well, “Tenet.”The three-hour runtime will scare off some people (even though that’s breezy these days if you’re James Cameron or Martin Scorsese), but the subject matter and artfulness of Nolan’s approach earn our attention every single second. “Oppenheimer” is a movie that makes you say “Oh, my God” over and over again — in awe and in terror. .
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