German Chancellor Angela Merkel is greeted by French President Emmanuel Macron as he hosts the leaders of the G5 Sahel countries - Mali, Burkina Faso, Niger, Chad and Mauritania, as well as Germany, Italy and and Saudi Arabia to discuss how to speed up the implementation of the G5 West African counter-terrorism force in La Celle Saint Cloud, near Paris, France, December 13, 2017. REUTERS/Philippe Wojazer