MISLEADING

While the described sequence of events is accurate, the terminology is technically incorrect. Standard thermonuclear weapons based on the Teller-Ulam design are classified as two-stage devices consisting of a fission primary and a fusion secondary (Britannica). Conventional explosives are used to compress the fissile material within the primary, making them a sub-component of the first stage rather than a distinct stage of the weapon's architecture (Union of Concerned Scientists). In nuclear physics nomenclature, a three-stage weapon refers specifically to a high-yield device that includes a tertiary nuclear stage, such as the American B41 bomb or the Soviet Tsar Bomba (Nuclear Information Service, Britannica). Consequently, describing the conventional explosive as a standalone stage conflates the internal mechanics of a single stage with the overall multi-stage design of the weapon.