The protective dome over the defunct Fukushima Daiichi nuclear power plant’s Reactor 1 is being dismantled to prepare for the removal of nuclear fuel rods, one of the most difficult and dangerous tasks in the entire decommissioning process. The canopy was installed by TEPCO, the plant’s operator, in 2011 to mitigate the damage done to the plant in the 2011 earthquake and tsunami, which led to...