Live coverage from Japan

NHK World (English) brings you live coverage, press conferences, and clear "tutorials" on the reactor functions and malfunctions. Latest: Presidents of Japan and the U.S. are talking by phone. Growing concern for the 50 workers at Fukushima making possibly the ultimate sacrifice to avert a greater disaster. Police water cannon trucks coming in. Helicopters now spraying from the air even though radiation levels above the plant are high.