Two Spanish journalists making a documentary about anti-poaching efforts and a third foreign national were killed in Burkina Faso after being kidnapped there on Monday, according to the authorities from the Western African nation and Spain. The killings come at a time of increasing violence in Burkina Faso and a deteriorating security situation in the Sahel, especially in the border area of Burkina Faso, Mali and Niger. Burkina Faso has seen attacks from many armed groups, several of them linked to the Islamic State and Al Qaeda in the Islamic Maghreb. Attackers on motorbikes have stormed countless villages, forcing residents...