A video taken by tiny drones sent into one of three damaged reactors at the Fukushima Daiichi nuclear power plant showed a gaping hole in the thick-walled steel container of the core, with lumps of likely melted fuel debris hanging from it, in a first sighting of a pressure vessel bottom since the meltdown 15 years ago.
The rare footage was taken by micro-drones — measuring 12 by 13 centimeters (4.7 by 5.1 inches) and weighing only 95 grams (3.3 ounces) each — deployed for a two-week mission to collect visual, radiation and other data from inside the Unit 3 reactor. It was released late Thursday.
