Once in awhile, it happens; but all flight decks are staffed by two equally trained and highly capable pilots, removing any cause for concern by the public.
While NASA's baseline 2015 budget request shows no funding for the long-running Mars mission past 2015, NASA says Opportunity could continue if extra funds become available.
What's involved in a waterborne search for a missing plane? The Coast Guard and its hardworking members have been and continue to be semper paratus, or “always ready.”