NASA to spend $20bn on moon base, nuclear-powered Mars spacecraft - Al Jazeera

1. NASA to spend $20bn on moon base, nuclear-powered Mars spacecraft  Al Jazeera
2. NASA announces new Mars mission, reshapes goals on the moon  CNN
3. NASA Unveils Initiatives to Achieve America’s National Space Policy  NASA (.gov)
4. NASA Sets Out New Plans and Timelines for Moon Base and Nuclear Mars Mission  The New York Times
5. NASA unveils ambitious $20 billion plan to build moon base near lunar south pole  CBS News