; (C) coordinate with advanced manufacturing and composites initiatives in other NASA mission directorates, as the Administrator considers appropriate; and (D) comply with existing Federal Aviation Administration regulations for use within programs in general aviation, commercial aviation, and military aeronautics. 404. On-demand air transportation It is the sense of Congress that— (1) greater use of high-speed air transportation, small airports, helipads, vertical flight infrastructure, and other aviation-related infrastructure can alleviate surface transportation congestion and support economic growth within cities; (2) NASA should continue— (A) to conduct research focused on concepts, technologies, and design tools; and (B) to support the evaluation of advanced technologies and operational concepts that can be leveraged by— (i) industry to develop future vehicles and systems; and (ii) the Federal Aviation Administration to support vehicle safety and operational certification; and (3) NASA should leverage ongoing efforts to develop advanced technologies to actively support the research needed for on-demand air transportation. 405. Unmanned aircraft systems (a) Unmanned aircraft systems operation program The Administrator shall— (1) research, develop, and test capabilities and concepts, including unmanned aircraft systems communications and spectrum-related resources, for integrating unmanned aircraft systems into the national airspace system; (2) leverage NASA’s partnership with industry focused on the advancement of technologies for future air traffic management systems for unmanned aircraft systems