President Recep Tayyip Erdogan is capping a three-nation tour of Africa with Nigeria, where the hard bargaining is about much more than commercial deals. After the success of Turkish-made drones in the war in Nagorno-Karabakh, arms sales are certainly in the mix. We’ll also ask about drone diplomacy and Erdogan's bid to take custody of Nigerian schools and universities run by the rival Gulenist movement, accused of orchestrating the failed 2016 coup in Turkey.