Frogwatch writes:

On Mar 12, 2:42Â*am, Pat Flannery wrote:
Life extension concepts are being discussed:http://spaceflightnow.com/news/n1003/11station/
...one problem in doing this is that, like Mir, you would then be using
equipment that was never rated for anywhere this long of orbital
lifetime, so you can expect a lot of failures as things wear out.

Pat

How could you make ISS "upgradable"? After all, it seems a shame to
de-orbit it just when it gets finished and it has yet to accomplish
anything.

Keep extending along Truss 1? Close off the inner modules as they become
inhabitable? Like an orbital Scrabble(tm) game.

?

Dave