The FBI spent years investigating J. Robert Oppenheimer, who helped make the WWII-ending atomic bomb. During the surveillance, interviewees alleged he was feeding nuclear secrets to the Soviet Union.

• The FBI spent years investigating J. Robert Oppenheimer, who helped make the WWII-ending atomic bomb.
• He was then tried by the Atomic Energy Commission, and his top-level security clearance was revoked.
• Reports from the FBI show Oppenheimer was accused of spreading information to the Soviets.

During an inquest into the actions of J. Robert Oppenheimer by the FBI, the agency investigated the "father of the atomic bomb" on suspicion of crimes including espionage and the dissemination of nuclear information to the Soviet Union.