By Joan Hennessy
The International Space Station --NASA image.
The International Space Station --NASA image.

        NASA announced Jan. 8 that its $100 billion International Space Station will get four more years in orbit, extending its operation from 2020 until 2024.

      The Obama administration's decision to keep the station in orbit will provide commercial space market opportunities, advance scientific research and help NASA prepare for deep-space exploration, agency spokesmen said during a press conference.
       The extension also keeps in orbit NASA’s signature spacecraft at a time when China’s moon mission is making headlines. It cements “continuing U.S. leadership in human spaceflight going forward,” according to a blog post by Charles Bolden, NASA administrator, and John Holdren, director of the White House Office of Science and Technology Policy.
      The space station’s budget is $3 billion a year. Asked if Congress could still pull the plug on the extension, a NASA spokesman said the agency is confident political support for the space station will continue.
     So what are the benefits of keeping the space station circling? NASA officials made their case:

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