"This time, when we go to the Moon, we're actually going to stay. We're not going to leave flags and footprints and then come home to not go back for another 50 years" he said. "We're doing it entirely different than every other country in the world. What we're doing is, we're making it sustainable so you can go back and forth regularly with humans."
The last person to walk on the Moon was Eugene Cernan in December 1972, during the Apollo 17 mission. Before humans set foot on the lunar surface again, NASA aims to land an unmanned vehicle on the Moon by 2024, and is already inviting bids from the burgeoning private sector to build the probe.