A massive explosion has struck a Japanese nuclear power plant after Friday's devastating earthquake. (From BBC News.) My hopes and thoughts are with this area of the world today. First an earthquake, then a tsunami, now this. EDIT: According to Russia Today, the possible meltdown could be worse than that which occurred at Chernobyl in 1986. UPDATE (from Russia Today): 1) The radiation levels are so severe that if a person is exposed for 1 hour, it is the same as getting 1 years' worth of poisoning. 2) Whilst they are not sure if the explosion occurred within the plant, it is being reported that the reactor roof has collapsed. 3) Russia is on stand-by to assist Japan. 4) Citizens in the area have been advised to stay in their homes to minimise radiation exposure.