Japanese authorities and the U.S. military on Saturday were racing to find ways to deliver new backup generators or batteries to a nuclear power reactor whose cooling facilities have been crippled by a loss of power as a result of the earthquake. The reactor, owned by Tokyo Electric Power Co., is currently drawing on battery power that may last only a few hours. Without electricity, the reactor will be unable to pump water to cool its hot reactor core, possibly leading to a meltdown or some other release of radioactive material.

via The Washington Post.