The latest blast at Japan’s most crippled nuclear reactor is the worst yet, and raises the likelihood of a nuclear catastrophe to uncomfortable levels, according to worried industry experts. The explosion, at the Fukushima Daiichi plant 150 miles from Tokyo, damaged the integrity of the reactor’s steel containment structure, and nearby radiation levels spiked after. Emergency workers were evacuated due to the threat of radiation exposure, meaning that they will not be around to help avert the possible nuclear meltdown. Such a meltdown would be the worst since Chernobyl 25 years ago.
