A build up in pressure in one of the reactors at a Japanese nuclear power plant damaged in the huge earthquake yesterday has caused an explosion, according to the government.They are assuring people that there is no immediate danger, that the metal container housing the nuclear material was not damaged, but do we really believe them? This is an extraordinarily dangerous situation with Japanese nuclear experts saying that not one, but two power generating sites are affected and at least 5 reactors may be at risk of melting down.Washington Post: Later Saturday an official with Japan's nuclear safety commission said a meltdown was possible because of the overheating, the Associated Press reported. Ryohei Shiomi added that even if there were a meltdown, it wouldn't affect residents outside the evacuated six-mile radius.Meanwhile, Tokyo Electric said it had decided to vent slightly radioactive steam and gas to relieve pressure that had increased sharply in the containment building at unit...(Read Full Post)