The Polygon People
Between 1949 and 1989 the Soviet Union tested 456 nuclear bombs in Semipalatinsk in Kazakhstan. The area the size of Belgium became known as the Polygon and when Kazakhstan became independent \u2013 25 years ago this week - it inherited the world\u2019s fourth biggest nuclear arsenal. The BBC\u2019s Rustam Qobil visits the Polygon to piece together its remarkable story.