; and (2) support flight testing activities. (c) Operating model In carrying out the 21st Century Aeronautics Research Capabilities Initiative, the Administrator shall, to the greatest extent practicable, build on NASA’s work on developing its Operating Model and the results of the Technical Capabilities Assessment Team. (d) Report (1) Report required Not later than 120 days after the date of enactment of this Act, the Administrator shall submit to the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate a report containing a 5-year plan for the implementation of the 21st Century Aeronautics Research Capabilities Initiative. (2) Elements The report required under this subsection shall include— (A) a description of proposed projects; (B) a description of how the projects align with the Aeronautics Strategic Implementation Plan; and (C) a timetable for carrying out activities and initiatives authorized under this section. (e) Authorization of appropriations There are authorized to be appropriated $50,000,000, funded through the Construction of Facilities account, for fiscal year 2019 to carry out this section. 404. Experimental plane program (a) Policy It is the policy of the United States to maintain the role of the United States as a world leader in aeronautical science and technology. (b) Objective A fundamental objective of NASA aeronautics research is the steady progression and expansion of high-speed flight research and capabilities, including the science and technology of critical underlying disciplines and competencies, the most important of which are computational-based analytical and predictive tools and methodologies, aero thermodynamics, high-speed flight propulsion, high-temperature structures and materials, and flight controls. 405. Hypersonic Technology project (a) Findings Congress finds that— (1) the development of new hypersonic flight technologies is important to the United States