Inside the daring operation to avert a new disaster at Chornobyl

When Ukrainian emergency workers clambered onto a damaged structure above Reactor No. 4 at the Chornobyl Nuclear Power Plant, there were eerie echoes of 1986.

Back then, when Ukraine was part of the Soviet Union and the site was known by its Russian name, Chernobyl, firefighters suffered horrific aftereffects from exposure to radiation while dealing with the consequences of an explosion in the reactor. I

n February of last year, emergency workers again raced to help put out a fire that Ukraine said was triggered by a Russian attack drone. To tackle the fire, they climbed the so-called confinement structure that stands taller than the Statue of Liberty and covers the destroyed reactor to prevent radiation from escaping.

Read more at Wall Street Journal