The cooling pool is seen at bottom before fuel units are removed at the Unit 3 of Fukushima Dai-ichi nuclear plant, in Okuma, Fukushima Prefecture, northeastern Japan, Monday, April 15, 2019. The operator of the tsunami-wrecked nuclear plant has begun removing fuel from a cooling pool at one of three reactors that melted down in the 2011 disaster, a milestone in the decades-long process to decommission the plant. The work is carried out remotely from a control room about 500 meters (yards) away because of still-high radiation levels inside the reactor building that houses the pool. (Kyodo News via AP)