4 marathons in 4 consecutive days in 4 countries: this is the challenge that the Director of the International Social Service (ISS) Switzerland took up in West Africa from 28 to 31 July 2016. Olivier Geissler will set off on a 4-stage race from Gambia to the Republic of Guinea (Conakry) via Senegal and Guinea-Bissau in order to raise awareness on the issue of mobile children and young migrants. This challenge also raises funds for the care of these children and young people.

Director: Rémi Willemin