Under the “Amad Plan,” Iran put in place during the early 2000s a set of five facilities to develop and test key nuclear weapon components. This document, from a collection of Excel files in the archive, appears to list all of the main nuclear weapons sites testing with propellants and high explosives and outfitted with high-speed diagnostic equipment. Collectively, they are a key aspect of developing nuclear weapons, appearing sufficient to ensure that the subcomponents work alone and in combination.