We now have to make long-term plans for the vehicles because they may be around for quite a while. Either mission could end tomorrow with a random part failure. With the rovers already performing well beyond their original design lifetimes, having a part wear out and disable a rover is a distinct possibility at any time.  -   Jim Erickson     Quotes
We now have to make long-term plans for the vehicles because they may be around for quite a while. Either mission could end tomorrow with a random part failure. With the rovers already performing well beyond their original design lifetimes, having a part wear out and disable a rover is a distinct possibility at any time. Jim Erickson