On board Mir, to breathe is a blessing and to drink water is a luxury. We all know about the oxygen candles they've had to light for the last week, but now even the good old H2O on the battered Russian space station is drying up. No more than two-months' worth is left; perhaps as little as six weeks remains. But NASA is riding to the rescue: the Shuttle will ride up there in September, filled to the brim with aquatic sustenance. It may not be Evian, but the Russians should be grateful. Who knows, by then they might be reduced to drinking their vodka neat.