TOKYO (AP) — The operator of the wrecked Fukushima nuclear power plant said Tuesday it is struggling with its latest efforts to stop contaminated underground water leaks from running into the sea. Tokyo Electric Power Co. said that some of the water was seeping over or around a "liquid glass wall" it has created by injecting chemicals into the soil that solidify into a wall. The latest problem involves underground water which has built up over the last month, since the company started creating the chemical walls in an embankment to stop leaks after it detected radiation spikes in water samples.