Mark McClusky says for elite athletes today, pushing boundaries and breaking records is all about "the aggregation of marginal gains."
Today Japanese officials suspended helicopter flights to dump water on an overheated reactor at the Fukushima Dai-ichi nuclear complex disabled by last week’s earthquake and tsunami.
They are evaluating if the unusual measure worked. At the same reactor, soldiers sprayed 30 tons of water toward a pool where used fuel is stored, hoping to cool it and keep it from catching fire. We speak to Michael Friedlander, a former nuclear power plant operator in the U-S about what it must be like for the workers still inside the plant.