Valery Legasov, the head of Chernobyl blast clear-up team

Its been exactly twenty years since Valery Legasov -- one of the Soviet Union's highly acclaimed scientists -- commited suicide. He headed the scientific group involved in the clear-up of the Chernobyl blast in 1986 and threw himself into finding what caused the disaster. However he met a lot of difficulties in his path, which -- as some say -- broke him . Russia Today's Alexey Yaroshevsky brings an XL report about Valery Legasov's life.