Although the situation at the Fukushima Daiichi nuclear plant is far from stabilized, evidence suggests that a complete meltdown is unlikely, Obama administration experts say. Meanwhile, a 7.1 aftershock rattles Japan, killing two and injuring more than 130. Although the damaged Fukushima Daiichi nuclear power plant has not yet been stabilized, there is no evidence that overheating during the last month has resulted in any melting of the reactor vessels or their containment structures, Obama administration officials said Thursday.