J. Robert Oppenheimer was an immensely complex figure, and the movie's based on a biography of him. While the movie is historically accurate in many ways, there are a few bits of fiction mixed in.

Oppenheimer met with some atomic bomb survivors, or hibakusha in Hiroshima. He said he believes that they understand the difference in the values of former US President Harry Truman, who ...

Playing so many varied roles brings with it a unique set of challenges. When no two characters are the same, no two problems ...

and Gary Oldman (as President Truman), Oppenheimer is a long shot commercially in a season when serious fare fares poorly. Younger audiences may be inclined to regard history as boring or irrelevant.