The wartime Soviet intelligence services had a codename for the Manhattan Project, the US’s plan to build an atom bomb: Enormoz. Christopher Nolan’s new film about it is absolutely Enormoz, maybe his biggest so far: a gigantic, post-detonation study, a PTSD narrative procedure filling the giant screen with a million agonised fragments that are the shattered dreams and memories of the project’s haunted, complex driving force, J Robert Oppenheimer, a brilliant physicist with the temperament of an artist who gave humanity the means of its own destruction. The main event is that terrifying first demonstration: the Trinity nuclear test in...