40 years after the Chernobyl disaster, the site remains one of the most contaminated places on Earth. After a Russian drone strike damaged the protective shell over Reactor 4 last year, concerns are growing over its condition and security.Al Jazeera’s Audrey Macalpine reports. pic.twitter.com/fUp4tX9XlE— Al Jazeera English (@AJEnglish) April 25, 2026