Christopher Nolan reacts to fans who assumed he detonated an atomic bomb on the set of 'Oppenheimer'

Christopher Nolan reacted to speculation that he detonated a real bomb for the film "Oppenheimer." "CG inherently is quite comfortable to look at," Nolan told THR. Cillian Murphy as J. Robert Oppenheimer in "Oppenheimer." The star-studded movie centers on American theoretical physicist J. Robert Oppenheimer (played by Cillian Murphy), who oversaw the invention of the atomic bomb as part of the Manhattan Project in the 1940s. Cillian Murphy as J. Robert Oppenheimer in "Oppenheimer."