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The Chernobyl disaster occurred on April 26, 1986.

The Chernobyl Nuclear Power Plant used RBMK nuclear reactors, which were flawed in design, contributing to the disaster.

The safety test that ultimately led to the disaster was intended to help determine how long turbines would spin and supply power to the main circulating pumps following a loss of main electrical power.

Two people died on the day of the explosion, and 29 more people died within a few days as a result of acute radiation poisoning.

The Chernobyl Exclusion Zone is an area of approximately 2,600 square kilometers (1,000 square miles) around the nuclear power plant that has been evacuated and is restricted from unauthorized person due to high levels of radiation.

Pripyat was the closest town to the Chernobyl Nuclear Power Plant, originally built for the plant's workers and their families, and was evacuated one day after the disaster.

The 'sarcophagus' is a steel and concrete structure that was hastily constructed around reactor 4 to contain the radioactivity after the explosion.

The Chernobyl disaster prompted an international response, including numerous countries providing aid and helping to mitigate the disaster’s consequences.

The UNCRDP was established in 2002 to address and coordinate international efforts for the recovery of the affected areas and communities.