Dag Hammarskjold was the youngest UN secretary general for seven decades - He was a son of Hjalmar Hammarskjöld, who served as Prime Minister of Sweden from 1914 to 1917.
32:58 minutes into the documentary, an inserted video is played with a caption "Johannesburg. South Africa 2014". The inserted video is actually the city of Pretoria (Twane) & not Johannesburg. The two cities are about 60 kilometres apart from each other.
"En cinquante ans" (1958), an industrial film produced by Gérard De Boe for the Belgian company Union Minière du Haut-Katanga, is featured, and credited.