Boulogne-Billancourt, France
Niger President Mahamadou Issoufou, Mauritanian President Mohamed Ould Abdel Aziz and Malian President...
Niger President Mahamadou Issoufou, Mauritanian President Mohamed Ould Abdel Aziz and Malian President Ibrahim Boubacar Keita, arrive to attend the One Planet Summit in Boulogne-Billancourt, near Paris, France December 12, 2017. REUTERS/Ludovic Marin/Pool