Christian Science Monitor: Radioactive water continued to drain from the damaged Fukushima Daiichi nuclear plant into the Pacific Ocean on Monday, as Japanese officials mounted a desperate effort to find and plug the source of the leak. On Saturday, the Tokyo Electric Power Company (TEPCO) thought it had discovered the leak's headwaters - a crack in a concrete pit near reactor No. 2. TEPCO workers poured concrete into the pit to close the breach, but the leak continued.