Inga Shaba safety helmet

Inga Shaba still be the longest electric power transmission line in the world, 1700 km.It transmits power from the Inga falls in the Congo river to the copper mining district of Katanga in the Democratic Republic of Congo (DRC).
CIS people gave me this safety helmet in Gembo camp 1974. CIS stands for Consortium of Constructors for Inga Shaba Overhed Powerline. Morrison-Knudsen was the main contractor.
To go into further details see: en.wikipedia.org/wiki/Inga-Shaba
french: fr.wikipedia.org/wiki/Inga-Shaba
italiano: it.wikipedia.org/wiki/Trasmissione_di_energia_elettrica#P…