The same thing happened in 2012, but Bethe Goldenfield says the party has a security camera that could help identify Saturday’s perpetrators.

At the time that Alpher, Bethe, and Gamow wrote their paper, not much was known about the nuclear reactions of protons and neutrons.

In their classified report, which was finished that September, Bethe’s scientists took issue with the characterization of the Soviet weapon as a hydrogen bomb.