➀ The dedication ceremony of El Capitan, the new top supercomputer in the US, was held at LLNL in California. The system, which is the number one machine on the Top500 list, is used for classified missions, primarily supporting US weapons programs. The article details the event and the technology behind El Capitan, including the use of AMD Instinct MI300A accelerators and HPE servers. ➁ The system's design and operation are highlighted, noting the integration of chiplets for CPU, GPU, and HBM, and the use of liquid cooling. ➂ The author, Patrick Kennedy, shares his experience of being allowed to take photos inside the supercomputer, which is unusual due to its classified nature.