Tokyo: The World Health Organization said on Monday that radiation in food after an earthquake damaged a Japanese nuclear plant was more serious than previously thought, eclipsing signs of progress in a battle to avert a catastrophic meltdown in its reactors. Engineers managed to rig power cables to all six reactors at the Fukushima complex, 240 km north of Tokyo, and started a water pump at one of them to reverse the overheating that has triggered the world