Amendment 9 to the NASA ARMD Research Opportunities in Aeronautics (ROA) 2015 NRA has been posted on the NSPIRES site. This release includes a topic in Appendix D.2 in support of the Leading Edge Aeronautics Research for NASA (LEARN) Project. This amendment seeks proposals for innovative, multi-Ă‚Ââ₏Âdisciplinary, multi-Ă‚Ââ₏Âinstitutional, team-Ă‚Ââ₏Âbased proposals of aeronautical concepts for distributed airport infrastructures and complementary air vehicles to provide efficient, safe, secure, sustainable and improved people mobility while utilizing existing small and medium airport locations in the USA. LEARN3 will use a 2-Ă‚Ââ₏Âstep proposal process. Step-Ă‚Ââ₏ÂA proposals are due 12/08/2015. Step-Ă‚Ââ₏ÂB proposals will be due 30 days after the notification for Step-Ă‚Ââ₏ÂB proposals is issued.