Highly radioactive water is leaking directly into the sea from a damaged pit near a crippled reactor at the Fukushima Daiichi nuclear plant, Japanese safety officials said Saturday, the latest setback in the increasingly difficult bid to regain control of the reactors. Although higher levels of radiation have been detected in the ocean water near the plant in recent days, the breach discovered Saturday is the first identified direct leak of such high levels of radiation into the sea. The leak, found at a maintenance pit near the plant’s No. 2 reactor, is a fresh reminder of the dangerous side...