Japanese officials try using army helicopter flights Thursday to dump water on an overheated reactor at the Fukushima Dai-ichi nuclear complex disabled by last week's tsunami. They are evaluating if the unusual measure is working. 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. Police failed in an earlier attempt to cool the pool with water cannons.
In an encouraging development, crews were finishing laying a new cable to supply more reliable electricity to motors, valves and pumps needed to keep reactors cool.