The National Nuclear Security Administration (NNSA) announced today that the Y-12 National Security Complex has completed production of the B61-13 Canned Subassemblies (CSAs) required to support the last production unit needs for the B61-13 program. ... “Our adversaries are rapidly modernizing and expanding their nuclear arsenals, so modernizing America’s stockpile has never been more urgent,” said NNSA Administrator Brandon Williams. “The Nuclear Security Enterprise is delivering critical capabilities at speed and strengthening the industrial capacity needed to stay ahead of evolving global threats. By executing our modernization programs ahead of schedule, we are strengthening America’s deterrent and supporting President Trump’s commitment to peace through strength.” In a two-stage thermonuclear weapon, the canned subassembly consists of the “secondary” stage capsule and other components sealed within a metal container. Together with the “primary,” the component is part of the weapon's nuclear explosive package. Following the conclusion of final verification activities, the final B61-13 CSA was diamond-stamped by NNSA Principal Deputy Administrator Scott Pappano on September 1, certifying it as War Reserve quality and approved for use within the U.S. nuclear stockpile. Once completed at Y-12, subassemblies are shipped to the Pantex Plant in Amarillo, Texas, for assembly into the B61‑13s, which are then delivered to the Department of War. https://www.energy.gov/nnsa/articles/nnsa-completes-b61-13-canned-subassembly-production-y-12-seven-months-ahead-schedule