The document discusses the importance of aviation to the US economy and national airspace system. It notes that aviation supports over 997,000 jobs and $445 billion in economic activity annually. It also highlights some of NASA's aeronautics research, including estimated cost savings from new technologies, safety research initiatives, and support for alternative fuel development. The budget provides funding to enhance contributions to NextGen and areas like unmanned aircraft integration and environmentally responsible aviation.

1. The National Airspace System (NAS)

3. ARMD Budget for FY2007-FY2015