(26 Aug 1997) Natural Sound The crew of the troubled Mir space station have managed to repair the oxygen generating system - several hours after the entire system shut down. Mission control, outside Moscow, said on Tuesday morning that systems now appeared to be operating normally. The problem was the latest in a series of setbacks for the ageing Mir and the Russian space program. The three men aboard Russia's rundown Mir space craft were temporarily left without any way to generate oxygen on