NASA works to resolve bug that threatens twin Mars rovers AP

NASA said Sunday its Spirit rover was a week away from rolling on Mars again and that the software problem vexing the spacecraft may threaten both it and its twin, Opportunity, for the duration of their double-barreled mission. Engineers deleted more files from Spirit’s flash memory but delayed until Monday reformatting it completely, giving them more time to diagnose the rover’s ongoing problems, mission manager Mark Adler said. NASA originally planned to perform the task Saturday.