On the 30th anniversary of the Chernobyl nuclear disaster, Kiev-based daily Denremembers "the red button that changed the world" on its front page, featuring a picture of Chernobyl's "trumpeting angel" memorial.

The Ukrainian-language newspaper tells the story of the April 26, 1986, nuclear catastrophe, one of the worst in history, and the fateful chain of events that led a power plant employee to press the EPS-5 button, triggering the explosion at reactor number four.

The disaster killed 31 people directly, and long-term effects of the resulting radioactive contamination are still being investigated.

For more, read this exclusive Le Monde/Worldcrunch article, Nuclear Past, Radioactive Future: In Chernobyl, 30 Years Later.