

So, this film is adapted from a true story recorded in history. Even so, recently, some fans realized the mistake in Oppenheimer's film so that it did not match history.
For your information, the stars on the flag represent the number of states in the United States, such as New York. In 1945, the United States only had 48 states, so the flag on that scene should only have 48 stars.
The flag of the United States of America only had 50 stars in 1960. This was after Alaska and Hawaii were incorporated as states of the United States in 1959 and 1960.
This is notes