SeventyyearsagothismonththebombingofHiroshimashowedtheappallingdestructivepoweroftheatomicbomb.MarkCousins’boldnewdocumentarylooksatdeathintheatomicage,butlifetoo.UsingonlyarchivefilmandanewmusicalscorebythebandMogwai,Atomicshowsusanimpressionistickaleidoscopeofournucleartimes:protestmarches,ColdWarsabrerattling,Cher...