The T4 mission team in front of the engravings of the spirals in the Oued Djérat (Tassili-n'Ajjer).
From the left: a Touareg, Edouard Bois de Chesne, commissioned by television to make a five-part film series about the Sahara, Mrs Eva Bruggmann, Pascal Pol, Sylvio Acatos, journalist, and Maximilien Bruggmann, head of Mission T4.