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As the USSR collapses, an investigation uncovers the cause of the accident and scale of the Soviet cover up. Today, Chernobyl's toxic legacy persists as the nuclear exclusion zone becomes a war zone, raising fears of another disaster.

Disaster: The Chernobyl Meltdown

Fallout

In the weeks following the meltdown, workers battle lethal radiation to clear debris and construct a protective tomb around the destroyed reactor. Amid speculation, Soviet scientists reveal what they can about the cause of the catastrophe.

Sacrifice

CNN provides viewers the fastest, most complete 24-hour coverage of breaking news. It offers a variety of programs ranging from business to sports, as well as topical interviews and the highly-regarded Larry King Live program.

The day after the incident, helicopter crews brave deadly radioactive smoke to extinguish the fire raging in the reactor core. As 50,000 locals evacuate, Soviet authorities try to conceal the scale and human cost of the accident.

Cover Up

On April 26, 1986, a massive explosion rips through a reactor during a safety test at a power plant in Ukraine, triggering the worst nuclear accident in history; within 24 hours, a lethal radioactive cloud starts to circle the globe.

Inferno

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Spanning the scope of the catastrophic collapse of the Chernobyl reactor, the Soviets' coverup and the present-day fallout with revealing interviews with survivors.

S1 E2 | Cover Up