Mali's Prime Minister Modibo Keita (center L) and Burkinabe's Prime Minister Paul Kaba Thieba (center R) survey damage in front of the Splendid Hotel in Ouagadougou, Burkina Faso, January 17, 2016, a day after security forces retook the hotel from al Qaeda fighters who seized it in an assault that killed two dozen people from at least 18 countries and marked a major escalation of Islamist militancy in West Africa. REUTERS/Joe Penney