During his 15-year career, he flew four missions into space, three times on space shuttles and once as the co-pilot of a Russian Soyuz spacecraft to the International Space Station. He has performed six spacewalks, in both US and Russian spacesuits, and has logged nearly 230 days in space. (CNN) Donald Trump's administration is floating a proposal to return to the moon -- and to shut down the International Space Station to help pay for it. There is a wild card here, too: I refer to the commercial spaceflight efforts of companies like Elon Musk's SpaceX and Jeff Bezos' Blue Origin. Consider, to begin, that the International Space Station, or ISS, is an essential piece of the National Aeronautics and Space Administration's program for space exploration.

Source: CNN February 23, 2018 00:25 UTC