NASA unveiled plans to build a moon base near the lunar south pole that will one day allow for American astronauts to have a permanent presence.

NASA unveiled a new vision for its near-term future Tuesday, including construction of a complete moon base, a major increase in robotic missions and a nuclear-powered spacecraft to bring a slew of he...

The first two phases would involve an investment of $20 billion over the next seven years and dozens of missions to the moon.