new ...of these and other minerals critical to U.S. national security, economic, infrastructure, and energy needs. In 2018, the list comprised 35 minerals. By 2020, it had grown to 50 minerals, with many focused on military applications. Some of these minerals include titanium for aerospace components, high temperature superalloys for turbines and hypersonic missiles, ceramic matrix composites, and hypersonic thermal protection systems. Another mineral on the list—lanthanum—is used for night vision goggles. Beryllium is used for targeting and surveillance systems as well as for fighter jets., 18 min ago