; and (B) to assist the Federal Aviation Administration in the integration of unmanned aircraft systems traffic management systems in the national airspace system; and (2) the test ranges (as defined in section 44801 of title 49, United States Code) should continue to be leveraged to research unmanned aircraft system integration and unmanned aircraft systems traffic management. 406. 21st Century Aeronautics Research Capabilities Initiative (a) Establishment The Administrator may establish a 21st Century Aeronautics Capabilities Initiative, within the Construction and Environmental Compliance and Restoration Account, to ensure that NASA possesses the infrastructure and capabilities necessary to conduct proposed flight demonstration projects across the range of NASA aeronautics interests. (b) Activities As part of the 21st Century Aeronautics Capabilities Initiative, the Administrator may carry out the following activities: (1) Any investments the Administrator considers necessary to upgrade and create facilities for civil and national security aeronautics research to support advancements in long-term foundational science and technology, advanced aircraft systems, air traffic management systems, fuel efficiency and electric propulsion technologies, system-wide safety assurance, autonomous aviation, and supersonic and hypersonic aircraft design and development. (2) Any measures the Administrator considers necessary to support flight testing activities, including— (A) continuous refinement and development of free-flight test techniques and methodologies; (B) upgrades and improvements to real-time tracking and data acquisition